1.14.11.4: procollagen-lysine 5-dioxygenase
This is an abbreviated version!
For detailed information about procollagen-lysine 5-dioxygenase, go to the full flat file.
Word Map on EC 1.14.11.4
-
1.14.11.4
-
prolyl
-
ehlers-danlos
-
hydroxylysine
-
jumonji
-
fibrosis
-
procollagens
-
fragility
-
domain-containing
-
hydroxylases
-
osteogenesis
-
4-hydroxylase
-
kyphoscoliosis
-
imperfecta
-
demethylase
-
glucosyltransferase
-
pyridinoline
-
hypermobl
-
galactosyltransferase
-
contractures
-
minoxidil
-
hypotonia
-
hydroxylysyl
-
hypermobility
-
bruck
-
fkbp10
-
hyperelasticity
-
underhydroxylated
-
sclera
-
scoliosis
-
laxity
-
chick-embryo
-
hyperextensibility
-
2-oxoglutarate-dependent
-
serpinh1
-
galactosylhydroxylysyl
-
ppib
-
medicine
-
crtap
-
diagnostics
- 1.14.11.4
-
prolyl
- ehlers-danlos
- hydroxylysine
-
jumonji
- fibrosis
- procollagens
-
fragility
-
domain-containing
- hydroxylases
-
osteogenesis
-
4-hydroxylase
-
kyphoscoliosis
- imperfecta
- demethylase
-
glucosyltransferase
-
pyridinoline
-
hypermobl
-
galactosyltransferase
- contractures
- minoxidil
- hypotonia
-
hydroxylysyl
-
hypermobility
-
bruck
- fkbp10
-
hyperelasticity
-
underhydroxylated
-
sclera
- scoliosis
-
laxity
-
chick-embryo
-
hyperextensibility
-
2-oxoglutarate-dependent
-
serpinh1
-
galactosylhydroxylysyl
- ppib
- medicine
-
crtap
- diagnostics
Reaction
Synonyms
2-oxoglutarate 5-dioxygenase 2, collagen lysine hydroxylase, Jmjd6, L230, LH, LH1, LH2, LH2 (long), LH2a, LH2b, LH3, LH3/PLOD3, lysine hydroxylase, lysine, 2-oxoglutarate 5-dioxygenase, lysine-2-oxoglutarate dioxygenase, lysyl 5S-hydroxylase, lysyl hydroxylase, lysyl hydroxylase 1, lysyl hydroxylase 2, lysyl hydroxylase 2 (long), lysyl hydroxylase 2a, lysyl hydroxylase 2b, lysyl hydroxylase 3, Lysyl hydroxylase-2b, lysyl-hydroxylase 1, lysylhydroxylase 2, lysylprotocollagen dioxygenase, More, multifunctional collagen lysyl hydroxylase, oxygenase, protocollagen lysine, di-, peptidyl-lysine, 2-oxoglutarate: oxygen oxidoreductase, peptidyllysine, 2-oxoglutarate:oxygen 5-oxidoreductase, PLOD, Plod1, PLOD2, Plod2a, Plod2b, PLOD2iso1, PLOD2iso2, PLOD3, procollagen lysyl hydroxylase 2, procollagen-lysine, procollagen-lysine 2-oxoglutarate 5-dioxygenase, procollagen-lysine 2-oxoglutarate 5-dioxygenase 2, procollagen-lysine, 2-oxoglutarate 5-dioxygenase, procollagen-lysine, 2-oxoglutarate 5-dioxygenase 2, procollagen-lysine,2-oxoglutarate 5-dioxygenase, protocollagen lysine hydroxylase, protocollagen lysyl hydroxylase, telopeptide lysyl hydroxylase, TLH
ECTree
1.14.11.4 procollagen-lysine 5-dioxygenaseAdvanced search results
results (
results (General Information
General Information on EC 1.14.11.4 - procollagen-lysine 5-dioxygenase
Please wait a moment until all data is loaded. This message will disappear when all data is loaded.
top
GENERAL INFORMATION 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
drug target
evolution
malfunction
metabolism
physiological function
additional information
-
heterocomplex formation between mouse and human LH3, between human LH1 and LH3 and between human LH2 and LH3, low amount of complexes formed in vivo
drug target
normalizing the cross-link pattern by selectively inhibiting LH2 (and thus hydroxy-alpha-aminoadipic acid-delta-semialdehyde cross-linking) alters the balance of collagen degradation. It is expected that this results in reversible fibrosis. Since the up-regulation of LH2 is seen in all organs, a drug that specifically inhibits LH2 activity can be used in a wide range of fibrotic disorders. Since LH2 catalyzes only a single reaction downstream in the fibrogenic cascade (namely the formation of unwanted cross-links in collagen of the fibrotic lesions), little (if any) side-effects are expected, as the deposited collagen in the wound area is expected to be normally modified, and thus have the properties (e.g. with respect to tensile strength) required for a normal function of the repaired tissue
drug target
PLOD2 is a gene of clinical relevance with implications in glioblastoma invasion and treatment strategies. PLOD2 expression is positively correlated with tumor grade and inversely associated with glioblastoma patient prognosis
drug target
the expression level of the procollagen-lysine, 2-oxoglutarate 5-dioxygenase (PLOD) might become a novel biomarker for prognosis and is a potential target for individual treatment decisions in lower-grade glioma (LGG)
evolution
-
LH3 belongs to the lysyl hydroxylase family of enzymes that has important roles in the biosynthesis of collagen
evolution
-
whereas in animals from sponges to humans the transfer of galactose to hydroxylysine in collagen is conserved, the mimivirus L230 enzyme transfers glucose to hydroxylysine, thereby defining another type of collagen glycosylation in nature. Utilization of glucose instead of the galactose found throughout animals as well as a bifunctional enzyme rather than two separate enzymes may represent a parallel evolutionary track in collagen biology
evolution
the enzyme belongs to the 2-oxoglutarate/Fe2+-dependent oxygenase family
evolution
-
whereas in animals from sponges to humans the transfer of galactose to hydroxylysine in collagen is conserved, the mimivirus L230 enzyme transfers glucose to hydroxylysine, thereby defining another type of collagen glycosylation in nature. Utilization of glucose instead of the galactose found throughout animals as well as a bifunctional enzyme rather than two separate enzymes may represent a parallel evolutionary track in collagen biology
-
malfunction
-
although differential expression of LH2 (long) is associated with fibrotic conditions, there is no direct evidence that the increased Pyr cross-links in the overaccumulated collagen contribute definitively to fibrosis
malfunction
reduction of lysyl hydroxylase 3 causes deleterious changes in the deposition and organization of extracellular matrix
malfunction
reduction of lysyl hydroxylase 3 causes deleterious changes in the deposition and organization of extracellular matrix. Mutations in the human LH3 gene cause a severe connective tissue disorder with features that overlap with a number of collagen disorders
malfunction
disorders of LH3 with a unique phenotype causing severe morbidity as a result of feauters that overlap with collagen disorders
malfunction
impairment of LH3 function significantly affects type I collagen fibrillogenesis
malfunction
-
lack of LH3 prevents the formation of hydroxylysine linked Glc-Gal structures in collagen. Secretion of type IV collagen is blocked in embryos that lack LH3 catalyzed Glc-Gal-Hyl residues, and this disrupts formation of the basement membranes that support tissues e.g. blood vessels. Changes in the lysyl hydroxylase activity of LH3 affect the adiponectin level and modifications in mouse, its secretion and oligomer distribtion, phenotype, overview. Recombinant adiponectin produced in LH3-/- knockout fibroblasts cells does not form middle molecular weight and high molecular weight oligomers
malfunction
-
PLOD2 knockdown prevents fibrillar collagen formation in breast tumors, decreased PLOD2 expression in breast cancer cells inhibits metastasis, also lung metastasis is significantly impaired by PLOD2 knockdown
malfunction
enzyme LH3 downregulation decreases MMP-9 recruitment to MRC-5 and thus MMP-9/LH3 interaction
malfunction
inhibition of prolyl hydroxylation and lysyl hydroxylation/glycosylation affects on adiponectin production, pharmacological LH inhibition causes significant suppression of adiponectin production, more particularly of the higher-order isoforms
malfunction
inhibition of prolyl hydroxylation and lysyl hydroxylation/glycosylation affects on adiponectin production, pharmacological LH inhibition causes significant suppression of adiponectin production, more particularly of the higher-order isoforms. Transient gene knock-down of LH3 encoding gene Plod3 causes a suppressive effect, especially on the high molecular-weight (HMW) isoforms
malfunction
LH3 knockout studies in mice demonstrate that the loss of LH3 leads to embryonic lethality due to disruption in the formation of basement membranes. The absence of LH3 glycosyltransferase activities are responsible for the lethality. The lack of LH3 leads to loss of all Glc-Gal-Hyl residues in collagens I, IV and VI and prevents the assembly and secretion of type IV and VI collagens. In addition, the mutated LH activity, one out of three activities of LH3, leads to underglycosylation of collagen IV and VI, which is detected as abnormal distribution and aggregation of these collagens in mouse tissues. Oligomerization of recombinant MBL-A is defective in LH3-/- knockout MEF cells
malfunction
mice with loss of function of Leprel2 (encoding P3H3) have the same loss of tissue type I collagen lysine-hydroxylation as that observed in the Sc65 knockout mice. Loss of Sc65 in the mouse results in instability of this complex, altered collagen lysine hydroxylation and cross-linking leading to connective tissue defects that include low bone mass and skin fragility, while it has no effect on prolyl 3-hydroxylation. Sc65KO mouse generation and confirmation of bone loss phenotype, overview
malfunction
patients with Bruck syndrome, a recessively inherited disorder with inactivating mutations in the gene encoding LH2 (PLOD2/LH2), have traits of osteogenesis imperfecta with congenital contractures of the large joints. Conversely, skin fibroblasts from patients with systemic sclerosis, a fibrotic disease involving skin and other organs, have elevated LH2 expression and increased production of HLCCs
malfunction
knockdown of PLOD2 in glioma cell lines leads to decreases in migration and invasion under normoxia and hypoxia
malfunction
-
lack of LH3 prevents the formation of hydroxylysine linked Glc-Gal structures in collagen. Secretion of type IV collagen is blocked in embryos that lack LH3 catalyzed Glc-Gal-Hyl residues, and this disrupts formation of the basement membranes that support tissues e.g. blood vessels. Changes in the lysyl hydroxylase activity of LH3 affect the adiponectin level and modifications in mouse, its secretion and oligomer distribtion, phenotype, overview. Recombinant adiponectin produced in LH3-/- knockout fibroblasts cells does not form middle molecular weight and high molecular weight oligomers
-
malfunction
-
LH3 knockout studies in mice demonstrate that the loss of LH3 leads to embryonic lethality due to disruption in the formation of basement membranes. The absence of LH3 glycosyltransferase activities are responsible for the lethality. The lack of LH3 leads to loss of all Glc-Gal-Hyl residues in collagens I, IV and VI and prevents the assembly and secretion of type IV and VI collagens. In addition, the mutated LH activity, one out of three activities of LH3, leads to underglycosylation of collagen IV and VI, which is detected as abnormal distribution and aggregation of these collagens in mouse tissues. Oligomerization of recombinant MBL-A is defective in LH3-/- knockout MEF cells
-
malfunction
-
impairment of LH3 function significantly affects type I collagen fibrillogenesis
-
malfunction
Mus musculus 714
-
mice with loss of function of Leprel2 (encoding P3H3) have the same loss of tissue type I collagen lysine-hydroxylation as that observed in the Sc65 knockout mice. Loss of Sc65 in the mouse results in instability of this complex, altered collagen lysine hydroxylation and cross-linking leading to connective tissue defects that include low bone mass and skin fragility, while it has no effect on prolyl 3-hydroxylation. Sc65KO mouse generation and confirmation of bone loss phenotype, overview
-
metabolism
-
in osteoarthritic human synovial fibroblasts, the enzyme expression is induced by TGF-beta via kinase ALK5, not ALK1, and Smad2/3P
metabolism
essential roles of insulin, AMPK signaling and lysyl and prolyl hydroxylases in the biosynthesis and multimerization of adiponectin, pathway regulation, detailed overview
metabolism
the endoplasmic reticulum complex including SC65 and prolyl 3-hydroxylase 3 affects the activity of lysyl-hydroxylase 1 potentially through interactions with the enzyme and/or cyclophilin B. The prolyl-hydroxylase complex in the endoplasmic reticulum controls lysyl-hydroxylase activity during collagen synthesis. SC65/LH1/P3H3 are interlinked within a protein complex in the endoplasmic reticulum
metabolism
Mus musculus 714
-
the endoplasmic reticulum complex including SC65 and prolyl 3-hydroxylase 3 affects the activity of lysyl-hydroxylase 1 potentially through interactions with the enzyme and/or cyclophilin B. The prolyl-hydroxylase complex in the endoplasmic reticulum controls lysyl-hydroxylase activity during collagen synthesis. SC65/LH1/P3H3 are interlinked within a protein complex in the endoplasmic reticulum
-
physiological function
-
the enzyme is responsible for the hydroxylation of collagen telopeptides
physiological function
the enzyme LH3 has an important role in the organization of the extracellular matrix and the cytoskeleton
physiological function
forms part of the many posttranslational modifications required during collagen biosynthesis
physiological function
-
dPlod is required for type-IV collagen secretion from hemocytes and fat body
physiological function
-
in hypoxic breast cancer cells, hypoxia-inducible factor 1 activates transcription of the PLOD1 and PLOD2 genes encoding procollagen lysyl hydroxylases that are required for the biogenesis of collagen, which is a major constituent of the extracellular matrix. High PLOD2 expression in breast cancer biopsies is associated with increased risk of mortality. PLOD2 is critical for fibrillar collagen formation by breast cancer cells, increases tumor stiffness, and is required for metastasis to lymph nodes and lungs
physiological function
lysyl hydroxylase (LH) catalyzes the hydroxylation of lysine residues in collagens, and contributes to the formation of more stable collagen cross-links
physiological function
-
lysyl hydroxylase 3 (LH3) is a post-translational modification enzyme with lysyl hydroxylase, collagen galactosyltransferase EC 2.4.1.50, and glucosyltransferase, EC 2.4.1.66, activities, LH3 is able to catalyze the three consecutive reactions required for the formation of unique hydroxylysine-linked carbohydrates, galactosylhydroxylysine and glucosylgalactosyl hydroxylysine, found in collagens and a few other proteins. The active sites for the different activities of the mutifunctional enzyme are localized separately in the C- and the N-terminal parts of the molecule. While the lysyl hydroxylase active site mediates retention of LH3 in the endoplasmic reticulum, the glucosyltransferase active site is required for the secretion of LH3 into the extracellular space
physiological function
lysyl hydroxylase 3 (LH3) is a post-translational modification enzyme with lysyl hydroxylase, collagen galactosyltransferase EC 2.4.1.50, and glucosyltransferase, EC 2.4.1.66, activities, LH3 is able to catalyze the three consecutive reactions required for the formation of unique hydroxylysine-linked carbohydrates, galactosylhydroxylysine and glucosylgalactosyl hydroxylysine, found in collagens and a few other proteins. The active sites for the different activities of the mutifunctional enzyme are localized separately in the C- and the N-terminal parts of the molecule. While the lysyl hydroxylase active site mediates retention of LH3 in the endoplasmic reticulum, the glucosyltransferase active site is required for the secretion of LH3 into the extracellular space
physiological function
lysyl hydroxylase 3 glucosylates galactosylhydroxylysine residues in type I collagen in osteoblast culture, role of LH3 in bone physiology
physiological function
-
lysyl hydroxylases are enzymes that catalyze the hydroxylation of lysine into hydroxylysine and, therefore, fulfill a crucial role in collagen modification and cross-linking. Lysyl hydroxylase 2b increases pyridinoline cross-links, making collagen less susceptible to enzymatic degradation
physiological function
-
regulation of the posttranslational lysine modifications in the collagenous domain is the key event in determining the function of adiponectin, changes in the lysyl hydroxylase activity of LH3 affect the adiponectin level and modifications in mouse, its secretion and oligomer distribtion
physiological function
-
the lysyl 5S-hydroxylase, JMJD6 acts on proteins involved in RNA splicin. JMJD6 in human cells is self-hydroxylated at Lys111JMJD6 and Lys167JMJD6 to give lysyl 5S-hydroxylase. Self-hydroxylation of JMJD6 may play a regulatory role in modulating the hydroxylation status of proteins involved in RNA splicing
physiological function
hydroxylysine aldehyde-derived collagen cross-links (HLCCs) accumulate in fibrotic tissues and certain types of cancer and are thought to drive the progression of these diseases. HLCC formation is initiated by lysyl hydroxylase 2 (LH2), an Fe(II) and 2-oxoglutarate-dependent oxygenase that hydroxylates telopeptidyl lysine residues on collagen
physiological function
in the endoplasmic reticulum, specific proline and lysine residues of newly translated procollagen chains are modified by prolyl- and lysyl-hydroxylases, respectively. These enzymes share a highly conserved catalytic 2-oxoglutarate, ascorbate- and Fe(II)-dependent dioxygenase domain
physiological function
intracellular procollagen-lysine, 2-oxoglutarate 5-dioxygenase enzymes induce hydroxylation of Lys residues on collagen prior to formation of triple helical pro-collagen molecules. Following secretion of pro-collagen molecules into the extracellular space, the telopeptidyl Hyl residues undergo LOX-induced oxidative deamination into Hylald, which then forms Hylald-derived aldimine cross-links that spontaneously rearrange into stable ketoamines; these further mature into stable Hylald-derived collagen cross-links (HLCCs). Epithelial tumor metastasis is preceded by an accumulation of collagen cross-links that heighten stromal stiffness and stimulate the invasive properties of tumor cells. Epithelial tumorigenesis is accompanied by changes in the biochemical type of collagen crosslinks. Ectopic LH2 expression increases cell migration and invasion in Boyden chambers and enhances tumor growth and metastatic capacity in syngeneic wild-type Cdkn1a mice
physiological function
intracellular procollagen-lysine, 2-oxoglutarate 5-dioxygenase enzymes induce hydroxylation of Lys residues on collagen prior to formation of triple helical pro-collagen molecules. Following secretion of pro-collagen molecules into the extracellular space, the telopeptidyl Hyl residues undergo LOX-induced oxidative deamination into Hylald, which then forms Hylald-derived aldimine cross-links that spontaneously rearrange into stable ketoamines; these further mature into stable Hylald-derived collagen cross-links (HLCCs). Epithelial tumor metastasis is preceded by an accumulation of collagen cross-links that heighten stromal stiffness and stimulate the invasive properties of tumor cells. Epithelial tumorigenesis is accompanied by changes in the biochemical type of collagen crosslinks. relative to normal lung tissues, tumor stroma contains higher levels of hydroxylysine aldehyde-derived collagen cross-links (HLCCs) and lower levels of lysine aldehyde-derived cross-links (LCCs), which are the predominant types of collagen cross-links in skeletal tissues and soft tissues, respectively. Lysyl hydroxylase 2 (LH2) hydroxylates telopeptidyl lysine residues on collagen, and shifts the tumor stroma toward a high-HLCC, low-LCC state, increasing tumor stiffness, and enhancing tumor cell invasion and metastasis. LH2 enhances the metastatic properties of tumor cells and functions as a regulatory switch that controls the relative abundance of biochemically distinct types of collagen cross-links in the tumor stroma
physiological function
LH2 promotes fibrosis and cancer metastasis. Peptidyl prolyl isomerase (PPIase) activity of FKBP65 positively modulates LH2 enzymatic activity and is critical for the formation of hydroxylysine-aldehyde derived intermolecular collagen cross-links. FKBP65 regulates LH2-mediated collagen cross-linking. FKBP65 interacts with LH2 through its peptidyl prolyl isomerase (PPIase) domains, FKBP65 forms a complex with LH2. Reconstitution with wild-type FKBP65 increases the enzyme activity by 7fold
physiological function
LH3 is essential for catalyzing formation of the glucosylgalactosylhydroxylysines of mannan-binding lectin-A (MBL-A), the first component of the lectin pathway of complement activation. LH3 catalyzes formation of Glc-Gal-Hyl residues in collagens and in collagenous domain of adiponectin. Similar lysine modifications are also present in MBL-A. LH3 also modifies the lysine residues in the collagenous domain of adiponectin, an insulin-sensitizing hormone, and thus affects the oligomerization and secretion of adiponectin
physiological function
procollagen-lysine,2-oxoglutarate 5-dioxygenase 2, PLOD2, is involved in the posttranscriptional modification of collagen molecules and considered as a key mediator of collagen cross-linking and thus an important factor for the stability of the extracellular matrix. PLOD2 is known to be associated with several connective tissue diseases, such as Ehlers-Danlos syndrome type VI A, systemic sclerosis, and Bruck syndrome. Isozyme PLOD2 is involved in the pathology of brain arteriovenous malformations (bAVM), severe conditions that can cause severe neurologic deficits and mortality. High levels of PLOD2 expression correlate with bAVM size. Although PLOD2 is not directly associated with bAVM hemorrhage, high PLOD2-expressing bAVM have a lower frequency of hemorrhage compared with low or medium PLOD2-expressing bAVM (25% vs. 63% and 75%, respectively)
physiological function
recruitment of matrix metalloproteinase-9 (MMP-9) to the fibroblast cell surface by lysyl hydroxylase 3 triggers transforming growth factor-beta (TGF-beta) activation and fibroblast differentiation. LH3 provides the docking mechanism for MMP-9 cell surface association via the MMP-9 FN domain. Recruitment of MMP-9 to fibroblast cell surface does not depend merely on LH3 expression at the cell membrane. LH3 provides a mechanism for deployment of MMP-9 catalytic activity at the fibroblast cell surface that promotes TGF-beta activation and the corresponding enhancement of alpha-SMA expression. MMP-9-induced TGF-beta activation promotes alpha-SMA expression in fibroblasts is consistent with a function that supports tumor progression. LH3 expressed in a variety of tumor cell types fails to recruit MMP-9 to their cell surface
physiological function
the enzyme catalyzes lysine hydroxylation, which is involved in collagen crosslinking and stabilization. Critical mechanical role of collagen crosslinking enzymes, e.g. in bone healing. Lysyl hydroxylase 1 (PLOD1) is one of the few collagen crosslinking enzymes associated with bone quality
physiological function
the enzyme hydroxylates lysine residues in collagen telopeptides and is essential for collagen pyridinoline cross-link formation. PLOD2 expression and subsequent pyridinoline cross-links are increased in fibrotic pathologies by transforming growth factorbeta-1 (TGFbeta1). Binding of the TGFbeta1 pathway related transcription factors SMAD3 and SP1-mediated TGFbeta1 enhanced PLOD2 expression and might be correlated to an increase of acetylated histone H3 and H4 at the PLOD2 promoter
physiological function
the enzyme LH2 catalyzes lysine hydroxylation, which is involved in collagen crosslinking and stabilization. PLOD2 has no role in determining bone quality
physiological function
the enzyme LH3 catalyzes lysine hydroxylation
physiological function
the family of lysyl hydroxylases is responsible for catalyzing the hydroxylation of protein-bound lysyl residues to yield hydroxylysyl residues, which can then undergo subsequent glycosylation. Lysyl and prolyl hydroxylases are both required for physiological adiponectin production and in particular are essential for the formation/secretion of the HMW isoforms
physiological function
lysyl hydroxylase 2 is responsible for the formation of telopeptidyl hydroxylysine, leading to the formation of hydroxy-alpha-aminoadipic acid-delta-semialdehyde cross-links by lysyl oxidases. The enzyme is universally up-regulated in fibrosis
physiological function
PLOD2 promotes tissue invasion of human glioma cells
physiological function
procollagen-lysine,2-oxoglutarate 5-dioxygenase (PLOD) family is involved in processes, such as tumor formation and cancer metastasis. A high expression of the PLOD family relates to poor prognosis and high infiltration of immune cells within the tumor microenvironment (TME)
physiological function
-
regulation of the posttranslational lysine modifications in the collagenous domain is the key event in determining the function of adiponectin, changes in the lysyl hydroxylase activity of LH3 affect the adiponectin level and modifications in mouse, its secretion and oligomer distribtion
-
physiological function
-
LH3 is essential for catalyzing formation of the glucosylgalactosylhydroxylysines of mannan-binding lectin-A (MBL-A), the first component of the lectin pathway of complement activation. LH3 catalyzes formation of Glc-Gal-Hyl residues in collagens and in collagenous domain of adiponectin. Similar lysine modifications are also present in MBL-A. LH3 also modifies the lysine residues in the collagenous domain of adiponectin, an insulin-sensitizing hormone, and thus affects the oligomerization and secretion of adiponectin
-
physiological function
-
lysyl hydroxylase 3 (LH3) is a post-translational modification enzyme with lysyl hydroxylase, collagen galactosyltransferase EC 2.4.1.50, and glucosyltransferase, EC 2.4.1.66, activities, LH3 is able to catalyze the three consecutive reactions required for the formation of unique hydroxylysine-linked carbohydrates, galactosylhydroxylysine and glucosylgalactosyl hydroxylysine, found in collagens and a few other proteins. The active sites for the different activities of the mutifunctional enzyme are localized separately in the C- and the N-terminal parts of the molecule. While the lysyl hydroxylase active site mediates retention of LH3 in the endoplasmic reticulum, the glucosyltransferase active site is required for the secretion of LH3 into the extracellular space
-
physiological function
-
lysyl hydroxylase 3 glucosylates galactosylhydroxylysine residues in type I collagen in osteoblast culture, role of LH3 in bone physiology
-
physiological function
Mus musculus 714
-
in the endoplasmic reticulum, specific proline and lysine residues of newly translated procollagen chains are modified by prolyl- and lysyl-hydroxylases, respectively. These enzymes share a highly conserved catalytic 2-oxoglutarate, ascorbate- and Fe(II)-dependent dioxygenase domain
-
