Proteins
Curated comments from UniProt
Type | Comment | Proteins |
---|---|---|
MB101_ARATH-3 MB101_ARATH MB101_ARATH-2 | developmental stage | Present in a small patch of cells on the innermost side of the hypocotyl hook of the germinating seedling, in the subapical pith cells of plants growing vegetatively, in a similar zone of expanding cells both in developing inflorescence stems, and below mature flowers and elongating siliques (PubMed:11743113). Accumulates in the pollen tube nucleus during pollen tube growth through the pistil (PubMed:23791732). |
MB101_ARATH-3 MB101_ARATH MB101_ARATH-2 | function | Transcription activator (PubMed:24278028, PubMed:25268707). Binds to 5'-CAACTGTC-3' and/or 5'-TAACAAA-3' motif in target gene promoter (e.g. alpha-amylase) to promote their expression (PubMed:11743113). Positive regulator of abscisic acid (ABA) responses leading to growth arrest during seed germination (PubMed:17217461). Promotes the expression of aleurone-related genes (e.g. CP1, CP, GASA1, BXL1 and BXL2) in seeds. Together with MYB33 and MYB65, promotes the programmed cell death (PCD) leading to vacuolation of protein storage vacuoles (PSVs) in the aleurone layers during seed germination (PubMed:20699403). Maybe involved in the regulation of leaves lamina morphogenesis (PubMed:25268707). Involved in pollen grain development (PubMed:22101548). Together with MYB97 and MYB120, functions as a male factor that controls pollen tube-synergid interaction in fertilization. Required for pollen tube growth arrest and sperm cell release in the female gametophyte, probably via the regulation of pollen tube-specific gene expression (PubMed:23791732, PubMed:24278028). |
MB101_ARATH-3 MB101_ARATH MB101_ARATH-2 | subcellular location | Detected in the vegetative nucleus of mature pollen grains and pollen tubes. |
MB101_ARATH-3 MB101_ARATH MB101_ARATH-2 | tissue specificity | Present mostly in flowers, siliques and floral shoot tips (PubMed:11743113, PubMed:25268707). Expression is restricted to the subapical pith cells of both vegetative and flowering plants and to the hypocotyl hook (PubMed:11743113). Expressed in pollen grains and pollen tube (PubMed:23791732, PubMed:24278028). Mostly expressed in mature pollen grains, and, to a lower extent, in inflorescences and siliques (PubMed:24278028). |
Function
Gene Ontology
cellular component | |
---|---|
pollen tube | ECO |
nucleus | ECO |
molecular function | |
DNA-binding transcription factor activity | ECO |
DNA binding | ECO |
biological process | |
regulation of gene expression | ECO |
positive regulation of programmed cell death | ECO |
regulation of leaf morphogenesis | ECO |
pollen development | ECO |
positive regulation of DNA-templated transcription | ECO |
pollen sperm cell differentiation | ECO |
response to gibberellin | ECO |
protein storage vacuole organization | ECO |
gibberellic acid mediated signaling pathway | ECO |
positive regulation of abscisic acid-activated signaling pathway | ECO |
regulation of pollen tube growth | ECO |
Interactions
Interaction Network
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