The PRC-barrel: a widespread, conserved domain shared by photosynthetic reaction center subunits and proteins of RNA metabolism.

ABSTRACT: BACKGROUND:The H subunit of the purple bacterial photosynthetic reaction center (PRC-H) is important for the assembly of the photosynthetic reaction center and appears to regulate electron transfer during the reduction of the secondary quinone. It contains a distinct cytoplasmic beta-barrel domain whose fold has no close structural relationship to any other well known beta-barrel domain. RESULTS:We show that the PRC-H beta-barrel domain is the prototype of a novel superfamily of protein domains, the PRC-barrels, approximately 80 residues long, which is widely represented in bacteria, archaea and plants. This domain is also present at the carboxyl terminus of the pan-bacterial protein RimM, which is involved in ribosomal maturation and processing of 16S rRNA. A family of small proteins cons

SUBMITTER: Anantharaman V 

PROVIDER: S-EPMC133445 | biostudies-literature | 2002 Oct

REPOSITORIES: biostudies-literature