Proteins
Curated comments from UniProt
Type | Comment | Proteins |
---|---|---|
GNAT2_ARATH-2 GNAT2_ARATH GNAT2_ARATH-3 | developmental stage | Expressed in the apical meristem, root vasculature and all veins in the cotyledons of young developing seedlings (PubMed:16461385). Loss of expression in the older maturing tissues (PubMed:16461385). Accumulates transiently in developing seeds (e.g. including embryos and seed coat), reaching a peak ten days after pollination (10 DAP) (PubMed:32354877). |
GNAT2_ARATH-2 GNAT2_ARATH GNAT2_ARATH-3 | function | (Microbial infection) Required for begomovirus infection and systemic spread (PubMed:12837950, PubMed:15452236, PubMed:16461385). In case of begomoviruses infection, acetylates the capsid protein (CP), but not the nuclear shuttle protein (NSP) (PubMed:12837950, PubMed:15452236, PubMed:16461385). Stimulates melatonin-triggered defense responses to the necrotrophic Botrytis cinerea (PubMed:34234798). |
GNAT2_ARATH-2 GNAT2_ARATH GNAT2_ARATH-3 | function | Protein acetyltransferase with dual specificity triggering both N-alpha-acetylation (NTA), with a preference for alanine, serine, threonine, methionine and to a lower extent valine as substrates (can also use glycine and leucine), and epsilon-lysine acetylation (KA) of several plastid proteins (PubMed:32633465). Triggers lysine acetylation in KEA1 and KEA2 (PubMed:29967049, PubMed:31865509). Acetylates in vitro histones H2A and H3 (PubMed:12837950). Does not act as a transcriptional activator but required for the dynamic reorganization of thylakoid protein complexes and grana during photosynthetic state transitions (PubMed:16461385, PubMed:29967049, PubMed:35792507). Involved in melatonin biosynthesis by catalyzing the formation of N-acetylserotonin (NAS) from serotonin and of melatonin (N-acetyl-5-methoxytryptamine) from 5-methoxytryptamine (5-MT) (PubMed:25250906, PubMed:32354877). By triggering melatonin biosynthesis, contributes to the chloroplast protein quality control (CPQC), which plays a pivotal role in starch synthesis, and confers melatonin-associated tolerance to high light (HL) stress (PubMed:29770489, PubMed:33806011). Prevents the accumulation of oil and anthocyanin content in mature seeds and avoids seed germination in a melatonin-dependent manner, but promotes mucilage production in the seed coat (PubMed:32354877, PubMed:33811388). Contributes to melatonin-mediated anthocyanin production in cold-exposed seedlings (PubMed:27047496). Implicated in melatonin-monitored circadian dynamics of stomatal aperture to minimize night water loss and promote drought tolerance, partly by triggering hydrogen sulfide H(2)S-dependent stomotal closure in response to osmotic stress (PubMed:32064655, PubMed:33924609, PubMed:34812898). |
GNAT2_ARATH-2 GNAT2_ARATH GNAT2_ARATH-3 | similarity | Belongs to the acetyltransferase family. GNAT subfamily. |
GNAT2_ARATH-2 GNAT2_ARATH GNAT2_ARATH-3 | tissue specificity | Highly expressed in cauline leaves and seeds, at lower levels in stems, siliques, inflorescences and rosettes leaves and at very low levels in roots (PubMed:12837950, PubMed:16461385, PubMed:31698875, PubMed:32354877, PubMed:32633465). Expressed in the xylem parenchyma and phloem of the leaves and root, and in guard cells of young leaves (PubMed:12837950, PubMed:16461385, PubMed:32633465). |
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