Protein
RNA polymerase sigma factor sigA
Organism
Oryza sativa subsp. japonica
Function
Sigma factors are initiation factors that promote the attachment of plastid-encoded RNA polymerase (PEP) to specific initiation sites and are then released (Probable). Controls the transcription of the psaA and psaB genes in chloroplast, and thus maintains the abundance of the core protein complex PsaA-PsaB of photosystem I (PSI) in the thylakoid membrane (PubMed:17651366). Maintains PSI activity, sufficient rate of electron transfer from PSII to PSI, and photochemical efficiency (PubMed:17651366).
Similarity
Belongs to the sigma-70 factor family.
Sequence
MTATPAVIGLSAGNRLLSASFGPTDLMPDKVSLGVGGGGGGGGGGGGGDAMSFAPPAPATPKLTAVAAHRLKLSPHGRAQVMRALRHHSSAAAALAPPPPPPPPPTPSPASRAAHAHDLESSLEAIVLLQRSMLEKQWELPFDDDNHAMAIGLAEDDDDTSKATVVVARSSVSARQRRMSGRRRGRTKNGAAHFAVSPELIQSRNRIYLRGTVSKELLTHKQVVHLSHKIKDGIWLQQQRSKLKEKLGNEPSYKQLAHSLKISPPELRSRMHESFLAREMLTMSNLRLVISIAQKYDNLGVELADLIQGGLIGLLRGIEKFDASRGFRISTYVYWWIRQGVSRALAENSKTFRLPTYLHERLIAIRGAKYELEDQGIAPTIENIAGSLNISEKKVLNATEAVNKVLSLDQQAFPSLNGLPGETLHSYIEDQNVANDPWHGFEEWYLKEEVNKLLNSTLNERERDIIRLYHGIGKQCHTWEDISRQFGLSRERVRQVGLIAMEKLKHAARRKNLEALLEDY