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3.A.7.1.1
Conjugal DNA-protein transfer complexes. The VirB4 ATPase may mediate dislocation of the membrane-integrated VirB2 pilin (N- and C-termini out; cytoplasmic loop= residues 90-94 inside) during biogenesis of the Agrobacterium VirB/VirD4 type IV secretion system. VirB6 domains direct the ordered export of the DNA substrate through a type IV secretion System (Jakubowski et al. 2004).

Accession Number:P0A3V8
Protein Name:VirB3 aka VIB3
Length:108
Molecular Weight:11760.00
Species:Agrobacterium tumefaciens [358]
Number of TMSs:1
Location1 / Topology2 / Orientation3: Membrane1 / Single-pass membrane protein2
Substrate Nucleopoteins, proteins

Cross database links:

RefSeq: NP_059801.1   
Entrez Gene ID: 1224320   
Pfam: PF05101   

Gene Ontology

GO:0016021 C:integral to membrane

References (1)

[1] “Characterization of the virB operon from an Agrobacterium tumefaciens Ti plasmid.”  Ward J.E.et.al.   3281947

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MNDRLEEATL YLAATRPALF LGVPLTLAGL FMMFAGFVIV IVQNPLYEVV LAPLWFGARL 
61:	IVERDYNAAS VVLLFLRTAG RSIDSAVWGG ATVSPNPIRV PPRGRGMV