HMM Summary Page: TIGR02797

FunctiontonB-system energizer ExbB
Gene SymbolexbB
Trusted Cutoff206.20
Domain Trusted Cutoff206.20
Noise Cutoff194.55
Domain Noise Cutoff194.55
Isology Typeequivalog
HMM Length211
Mainrole CategoryTransport and binding proteins
Subrole CategoryCations and iron carrying compounds
Gene Ontology TermGO:0015078: hydrogen ion transmembrane transporter activity molecular_function
GO:0015570: energizer of outer membrane receptor-mediated transport activity molecular_function
GO:0016020: membrane cellular_component
AuthorHaft DH
Entry DateJan 20 2006 10:26AM
Last ModifiedFeb 14 2011 3:27PM
CommentThis model describes ExbB proteins, part of the MotA/TolQ/ExbB protein family. The paired proteins MotA and MotB, TolQ and TolR, and ExbB and ExbD harness the proton-motive force to drive the flagellar motor, energize the Tol-Pal system, or energize TonB, respectively. Tol-Pal and TonB are both active at the outer membrane. Genomes may have many different TonB-dependent receptors, of which many of those characterized are involved in siderophore transport across the outer membrane.
ReferencesRN [1] RM 12896813 RT Molecular modeling of the bacterial outer membrane receptor energizer, ExbBD/TonB, based on homology with the flagellar motor, MotAB. RA Zhai YF, Heijne W, Saier MH Jr. RL Biochim Biophys Acta. 2003 Aug 7;1614(2):201-10.
Genome PropertyGenProp0543: TonB-dependent transport (HMM)