MG1655
W3110
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Gene Report : secB
PEC Original Annotations
Essentiality
     Class non-essential
     References (PMID)
Mol Microbiol. 1997;26(5):1013-21.
Expression of gpsA encoding biosynthetic sn-glycerol 3-phosphate dehydrogenase suppresses both the LB- phenotype of a secB null mutant and the cold-sensitive phenotype of a secG null mutant.
Shimizu H, Nishiyama K, Tokuda H. ( 9426138 )
     Deletion OCL09 (D)  ,  OCL09-9 (D)  
Related gene (W3110 PEC)
     Gene Search Search MG1655 PEC by gene name:  secB
Related strains
     Strains Search Search strains by gene name:  secB   Search strains by all related name:  secB b3609 ECK3599 f155 JW3584

General information  (Go to Linear View:)
 Gene Name secB  
 Alternative name b3609,ECK3599,f155,JW3584  
 Location, Length 3,781,684 - 3,782,151 (  -  ) ;   81.51 min ; 468 (bp) ,   155 (aa) Go to Linear View
 Product protein export chaperone  
 Operon Name secB-gpsA  
 Note protein export; molecular chaperone; may bind to signel sequence; GO_component: GO:0005737 - cytoplasm; GO_process: GO:0006457 - protein folding  
 Function transport; Protein, peptide secretion  
 Gene Ontology GO:0005737 ; cytoplasm ( secB )
GO:0006457 ; protein folding ( secB )
GO:0006810 ; transport ( secB )
GO:0015031 ; protein transport ( secB )
GO:0051082 ; unfolded protein binding ( secB )
GO:0051262 ; protein tetramerization ( secB )
GO:0065002 ; intracellular protein transport across a membrane ( secB )
 PID 1790038  
 EC number
  (KEGG Pathway)
 
 
SWISS-PROT  ( Show details )
  botton Entry name(Acc.no) SECB_ECOLI ( P15040 )
    -  Protein name Protein-export protein secB.  
    -  Synonyms  
    -  Gene name OrderedLocusNames=b3609, c4432, z5036, ECs4487, SF3648, S4120;  

 Linear View (Whole Mode)
View Location
   3770.0  –  3795.0 (KBP)

Homology Analysis
BLAST
    Bacteria
         GTOP secB (  homologous genes of other bacterias  )  
    PDB     (database updated : 2007.02.20 )
         PSI-BLAST Chain A, Crystal Structure Of Secb From Escherichia Coli  
    SWISS-PROT     (database updated : 2007.02.20 )
         BLAST Protein-export protein secB  
         PSI-BLAST Protein-export protein secB
    nr     (database updated : 2007.02.20 )
         BLAST export protein SecB [Escherichia coli CFT073]  
Pfam 28.0   (database updated : 2015-05 )
    Pfam
PROSITE
    PROSITE ASN_GLYCOSYLATION    CK2_PHOSPHO_SITE    MYRISTYL     

Other Cross-Reference
    COG COG1952U 
    EcoCyc secB 

MMBR References
J Bacteriol. 1993;175:4036-4044
prlA supression of defective export of maltose-binding protein in secB mutants of Escherichia coli.
Francetic, O., M. P. Hanson, and C. A. Kumamoto.
J Bacteriol. 1992;174:5219-5227
Involvement of SecB, a chaperone, in the export of ribose-binding protein.
Kim, J., Y. Lee, C. Kim, and C. Park.
J Biol Chem. 1995;270:22831-22835
Diverse effects of mutation on the activity of the Escherichia coli export chaperone SecB.
Kimsey, H. H., M. D. Dagarag, and C. A. Kumamoto.
Mol Microbiol. 1991;5(1):19-22.
Molecular chaperones and protein translocation across the Escherichia coli inner membrane.
Kumamoto CA. ( 1673017 )
J Bacteriol. 1983;154(1):253-60.
Mutations in a new gene, secB, cause defective protein localization in Escherichia coli.
Kumamoto CA, Beckwith J. ( 6403503 )
J Bacteriol. 1985;163(1):267-74.
Evidence for specificity at an early step in protein export in Escherichia coli.
Kumamoto CA, Beckwith J. ( 3891730 )
EMBO J. 1989;8:2703-2709
Three pure chaperone proteins of Escherichia coliSecB, trigger factor and GroELform soluble complexes with precursor proteins in vitro.
Lecker, S., R. Lill, T. Ziegelhoffer, C. Georgopoulos, P. J. Bassford, C. A. Kumamoto, and W. Wickner.
J Bacteriol. 1987;169(12):5408-15.
Sequence analysis, transcriptional organization, and insertional mutagenesis of the envA gene of Escherichia coli.
Beall B, Lutkenhaus J. ( 2824434 )
J Bacteriol. 1995;177:1906-1907
Export of periplasmic galactose-binding protein in Escherichia coli depends on the chaperone SecB.
Powers, E. L., and L. L. Randall.
J Bacteriol. 1988;170(8):3404-14.
Nucleotide sequence of the secA gene and secA(Ts) mutations preventing protein export in Escherichia coli.
Schmidt MG, Rollo EE, Grodberg J, Oliver DB. ( 2841285 )
Cell. 1989;58(4):695-705.
SecB functions as a cytosolic signal recognition factor for protein export in E. coli.
Watanabe M, Blobel G. ( 2548733 )
Proc Natl Acad Sci U S A. 1995;92:10133-10136
High-affinity binding of Escherichia coli SecB to the signal sequence region of a presecretory protein.
Watanabe, M., and G. Blobel.

Sequences
Amino acid
FASTA format
0001 MSEQNNTEMT FQIQRIYTKD ISFEAPNAPH VFQKDWQPEV KLDLDTASSQ LADDVYEVVL RVTVTASLGE 
0071 ETAFLCEVQQ GGIFSIAGIE GTQMAHCLGA YCPNILFPYA RECITSMVSR GTFPQLNLAP VNFDALFMNY 
0141 LQQQAGEGTE EHQDA

Nucleotide
FASTA format

View sequence out neighbor 100bp
-100                                             tggatgcacg tggtggactg gatcccctgc 
-070 tgaaataacg tgtgaacgtt ggcattacat tgcgcagtat ttaaggacaa cacttaaggg ttttctacac 
0001 atgtcagaac aaaacaacac tgaaatgact ttccagatcc aacgtattta taccaaggat atctctttcg 
0071 aagcgccgaa cgcgccgcac gttttccaga aagattggca accagaagtt aaacttgatc tggatacggc 
0141 atcttcccaa ctggcagatg acgtatacga agtggtactg cgtgttaccg taacggcctc tttgggcgaa 
0211 gaaaccgcgt tcctgtgtga agttcagcag ggcggtattt tctccatcgc gggtatcgaa ggcacccaga 
0281 tggcgcattg cctgggagca tactgcccga acattctgtt cccgtatgct cgtgagtgca tcaccagcat 
0351 ggtatcccgc ggtacattcc cgcaactgaa ccttgcgccg gttaacttcg atgcgctgtt catgaactat 
0421 ttgcagcagc aggctggcga aggtactgaa gaacatcagg atgcctgatg aaccaacgta atgcttcaat 
0491 gactgtgatc ggtgccggct cgtacggcac cgctcttgcc atcaccctgg caagaaatgg ccacgaggtt 
0561 gtcctctg