NCBI Accession #
NP_172384.1
NCBI GenBank Nucleotide #
NM_100781.5
NCBI Official Full Name
26S proteasome AAA-ATPase subunit RPT5B
NCBI Official Symbol
RPT5B
NCBI Official Synonym Symbols
26S proteasome AAA-ATPase subunit RPT5B; F7G19.2; F7G19_2
NCBI Protein Information
26S proteasome AAA-ATPase subunit RPT5B
NCBI Summary
Encodes RPT5b (Regulatory Particle 5b), one of the six AAA-ATPases of the proteasome regulatory particle. Essential for gametophyte development. In Arabidopsis, the RPT5 subunit is encoded by two highly homologous genes, RPT5a and RPT5b. RPT5a and RPT5b show accession-dependent functional redundancy. In Wassilewskija (Ws) accession: mutant alleles of RPT5a displayed 50% pollen lethality, indicating that RPT5a is essential for male gametophyte development. In the Columbia (Col) accession, a rpt5a mutant allele did not display such a phenotype because the RPT5b Col allele complements the rpt5a defect in the male gametophyte, whereas the RPT5b Ws allele does not. Double rpt5a rpt5b mutants in Col background showed a complete male and female gametophyte lethal phenotype.
UniProt Synonym Gene Names
TBP1; TBP-1 homolog B
UniProt Protein Name
26S proteasome regulatory subunit 6A homolog B
UniProt Synonym Protein Names
26S proteasome AAA-ATPase subunit RPT5b; Proteasome 26S subunit 6A homolog B; Regulatory particle triple-A ATPase subunit 5b; Tat-binding protein 1 homolog B; TBP-1 homolog B
UniProt Primary Accession #
O04019
UniProt Secondary Accession #
Q93V77
UniProt Related Accession #
O04019
UniProt Comments
The 26S proteasome is involved in the ATP-dependent degradation of ubiquitinated proteins. The regulatory (or ATPase) complex confers ATP dependency and substrate specificity to the 26S complex.