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Literature summary for 1.11.1.11 extracted from

  • Li, C.; Liu, Y.; Liu, X.; Mai, K.K.K.; Li, J.; Guo, X.; Zhang, C.; Li, H.; Kang, B.H.; Hwang, I.; Lu, H.
    Chloroplast thylakoid ascorbate peroxidase PtotAPX plays a key role in chloroplast development by decreasing hydrogen peroxide in Populus tomentosa (2021), J. Exp. Bot., 72, 4333-4354 .
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
enzyme PtotAPX expression analysis in callus cultures, recombinant expression of GFP-tagged enzyme in tobacco plants, localization to the chloroplasts Populus tomentosa

Protein Variants

Protein Variants Comment Organism
additional information overexpression or suppression of PtoAPX in Populus tomentosa callus. Light-induced chloroplast development is enhanced in PtotAPX-overexpressing transgenic Populus tomentosa callus with lower levels of hydrogen peroxide, but is suppressed in PtotAPX antisense transgenic callus with higher levels of hydrogen peroxide. The suppression of light-induced chloroplast development in PtotAPX antisense transgenic callus is relieved by the exogenous reactive oxygen species scavenging agent N,N'-dimethylthiourea (DMTU) Populus tomentosa

Localization

Localization Comment Organism GeneOntology No. Textmining
chloroplast
-
Populus tomentosa 9507
-
additional information transcriptome analysis during light-induced chloroplast development, detailed overview Populus tomentosa
-
-
thylakoid
-
Populus tomentosa 9579
-

Metals/Ions

Metals/Ions Comment Organism Structure
Fe2+ in the heme group Populus tomentosa

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2 L-ascorbate + H2O2 + 2 H+ Populus tomentosa
-
L-ascorbate + L-dehydroascorbate + 2 H2O
-
?

Organism

Organism UniProt Comment Textmining
Populus tomentosa
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
callus
-
Populus tomentosa
-
leaf
-
Populus tomentosa
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2 L-ascorbate + H2O2 + 2 H+
-
Populus tomentosa L-ascorbate + L-dehydroascorbate + 2 H2O
-
?

Synonyms

Synonyms Comment Organism
PtotAPX
-
Populus tomentosa
thylakoid ascorbate peroxidase
-
Populus tomentosa

Cofactor

Cofactor Comment Organism Structure
heme
-
Populus tomentosa

General Information

General Information Comment Organism
malfunction light-induced chloroplast development is enhanced in PtotAPX-overexpressing transgenic Populus tomentosa callus with lower levels of hydrogen peroxide, but is suppressed in PtotAPX antisense transgenic callus with higher levels of hydrogen peroxide Populus tomentosa
metabolism chloroplasts with elaborate thylakoids can develop from proplastids in the cells of calli derived from leaf tissues of Populus tomentosa upon exposure to light. Chloroplast development is confirmed at the molecular and cellular levels and transcriptome analysis reveals that genes related to photoreceptors and photosynthesis are significantly upregulated during chloroplast development in a time-dependent manner. In light-induced chloroplast development, a key process is the removal of hydrogen peroxide, in which thylakoid-localized PtotAPX plays a major role Populus tomentosa
physiological function chloroplast development is a complex process that is critical to the growth and development of plants, overview. Chloroplast thylakoid ascorbate peroxidase PtotAPX plays a key role in chloroplast development from proplastids upon exposure to light in Populus tomentosa and in thylakoid development by decreasing hydrogen peroxide Populus tomentosa