PbpE

• Description: penicillin-binding protein PBP 4* (spore cortex)
  
  

Gene name	pbpE
Synonyms
Essential	no
Product	penicillin-binding protein PBP 4* (spore cortex)
Function	endopeptidase
MW, pI	51 kDa, 4.835
Gene length, protein length	1353 bp, 451 aa
Immediate neighbours	racX, sacB
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

Categories containing this gene/protein

cell wall synthesis, cell wall degradation/ turnover, cell envelope stress proteins (controlled by SigM, V, W, X, Y)

This gene is a member of the following regulons

SigW regulon

The gene

Basic information

• Locus tag: BSU34440

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

• Protein family: beta-lactamase family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization: spore cortex

Database entries

• Structure: 3TG9 (from Bacillus halodurans, 27% identity, 59% similarity)

• UniProt: P32959

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: pbpE-racX PubMed

• Sigma factor: SigW PubMed

• Regulation:
  • repressed during logrithmic growth (AbrB) PubMed, indirect regulation by AbrB PubMed
  • induced by cell wall stress (SigW) PubMed

• Regulatory mechanism:

• Additional information: the mRNA is very stable (half-life > 15 min) PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

María Mercedes Palomino, Carmen Sanchez-Rivas, Sandra M Ruzal
High salt stress in Bacillus subtilis: involvement of PBP4* as a peptidoglycan hydrolase.
Res Microbiol: 2009, 160(2);117-24
[PubMed:19063962] [WorldCat.org] [DOI] (P p)

G Hambraeus, C von Wachenfeldt, L Hederstedt
Genome-wide survey of mRNA half-lives in Bacillus subtilis identifies extremely stable mRNAs.
Mol Genet Genomics: 2003, 269(5);706-14
[PubMed:12884008] [WorldCat.org] [DOI] (P p)

Stephan Zellmeier, Ulrich Zuber, Wolfgang Schumann, Thomas Wiegert
The absence of FtsH metalloprotease activity causes overexpression of the sigmaW-controlled pbpE gene, resulting in filamentous growth of Bacillus subtilis.
J Bacteriol: 2003, 185(3);973-82
[PubMed:12533473] [WorldCat.org] [DOI] (P p)

Min Cao, Tao Wang, Rick Ye, John D Helmann
Antibiotics that inhibit cell wall biosynthesis induce expression of the Bacillus subtilis sigma(W) and sigma(M) regulons.
Mol Microbiol: 2002, 45(5);1267-76
[PubMed:12207695] [WorldCat.org] [DOI] (P p)

X Huang, A Gaballa, M Cao, J D Helmann
Identification of target promoters for the Bacillus subtilis extracytoplasmic function sigma factor, sigma W.
Mol Microbiol: 1999, 31(1);361-71
[PubMed:9987136] [WorldCat.org] [DOI] (P p)

M A Strauch
Delineation of AbrB-binding sites on the Bacillus subtilis spo0H, kinB, ftsAZ, and pbpE promoters and use of a derived homology to identify a previously unsuspected binding site in the bsuB1 methylase promote.
J Bacteriol: 1995, 177(23);6999-7002
[PubMed:7592498] [WorldCat.org] [DOI] (P p)

D L Popham, P Setlow
Cloning, nucleotide sequence, and regulation of the Bacillus subtilis pbpE operon, which codes for penicillin-binding protein 4* and an apparent amino acid racemase.
J Bacteriol: 1993, 175(10);2917-25
[PubMed:8491712] [WorldCat.org] [DOI] (P p)