1TL6

Solution structure of T4 bacteriphage AsiA monomer


Domain Annotation: SCOP Classification SCOP Database (version: 2.0) Homepage

ChainDomainClassArchitectureTopologyHomology
1.10.1810.10 Mainly Alpha Orthogonal Bundle Anti-sigma factor AsiA Anti-Sigma Factor A

Protein Family Annotation Pfam Database Homepage

ChainsAccessionIdentifierDescriptionCommentsSource
PF09010Anti-Sigma Factor A (AsiA)Anti-Sigma Factor AAnti-sigma factor A is a transcriptional inhibitor that inhibits sigma 70-directed transcription by weakening its interaction with the core of the host's RNA polymerase. It is an all-helical protein, composed of six helical segments and intervening l ...Anti-sigma factor A is a transcriptional inhibitor that inhibits sigma 70-directed transcription by weakening its interaction with the core of the host's RNA polymerase. It is an all-helical protein, composed of six helical segments and intervening loops and turns, as well as a helix-turn-helix DNA binding motif, although neither free anti-sigma factor nor anti-sigma factor bound to sigma-70 has been shown to interact directly with DNA. In solution, the protein forms a symmetric dimer of small (10.59 kDa) protomers, which are composed of helix and coil regions and are devoid of beta-strand/sheet secondary structural elements [1].
Domain

Gene Product Annotation Gene Product Annotation

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
10 kDa anti-sigma factor