Reviewed, UniProtKB/Swiss-Prot P57161 (SECB_BUCAI)

Names and origin

Protein names

Recommended name:
    Protein-export protein secB

Gene names

Name:	secB
Ordered Locus Names:	BU053

Organism

Buchnera aphidicola subsp. Acyrthosiphon pisum (Acyrthosiphon pisum symbiotic bacterium) [Complete proteome] [HAMAP]

Taxonomic identifier

118099 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Buchnera

Protein attributes

Sequence length	142 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	One of the proteins required for the normal export of preproteins out of the cell cytoplasm. It is a molecular chaperone that binds to a subset of precursor proteins, maintaining them in a translocation-competent state. It also specifically binds to its receptor secA By similarity.
Subunit structure	Homotetramer, a dimer of dimers. One homotetramer interacts with 1 secA dimer By similarity.
Subcellular location	Cytoplasm By similarity.
Sequence similarities	Belongs to the secB family.

Ontologies

Keywords
Biological process	Protein transport Translocation Transport
Cellular component	Cytoplasm
Molecular function	Chaperone
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	protein folding Inferred from electronic annotation. Source: HAMAP protein tetramerization Inferred from electronic annotation. Source: InterPro protein transport Inferred from electronic annotation. Source: HAMAP transmembrane transport Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	cytoplasm Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	unfolded protein binding Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 142	142	Protein-export protein secB HAMAP MF_00821		PRO_0000055356

Sequences

	Sequence		Length	Mass (Da)
	P57161-1 [UniParc]. Last modified December 1, 2000. Version 1. Checksum: C81D1176607D91D9	FASTA	142	16,571
	10 20 30 40 50 60 MLEEKKKQES FEIQRIYIKD VSFEAPNTPN IFHVNWIPTI KLNLNTTTKK IKENIFEVVL 70 80 90 100 110 120 MVKVTVKIKE DLVFLCDIDQ AGIFFIANIN EKRLKHCLYS YCPNILFPYA RTCISNLVSC 130 140 GSFPQMNLAP INFDALYHDH IK

References

[1]	"Genome sequence of the endocellular bacterial symbiont of aphids Buchnera sp. APS." Shigenobu S., Watanabe H., Hattori M., Sakaki Y., Ishikawa H. Nature 407:81-86(2000) [PubMed: 10993077] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: Tokyo 1998.

Cross-references

Sequence databases
EMBLGenBankDDBJ	BA000003 Genomic DNA. Translation: BAB12776.1.
RefSeq	NP_239890.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	1109460.
GenomeReviews	Gene locus BU053 in contig BA000003_GR.
KEGG	buc:BU053.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	P57161.
OMA	GFPPLMI
Enzyme and pathway databases
BioCyc	BSP107806:BU053-MON.
Family and domain databases
HAMAP	MF_00821. [Tree]
InterPro	IPR003708. SecB. [Graphical view]
Gene3D	G3DSA:3.10.420.10. SecB. 1 hit.
Pfam	PF02556. SecB. 1 hit. [Graphical view]
PRINTS	PR01594. SECBCHAPRONE.
TIGRFAMs	TIGR00809. secB. 1 hit.
ProtoNet	Search...

Entry information

Entry name

SECB_BUCAI

Accession

Primary (citable) accession number: P57161

Entry history

Integrated into UniProtKB/Swiss-Prot:	December 1, 2000
Last sequence update:	December 1, 2000
Last modified:	November 24, 2009
This is version 45 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)