PnpA

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  • Description: polynucleotide phosphorylase

Gene name pnpA
Synonyms comR
Essential no
Product polynucleotide phosphorylase (PNPase) (EC 2.7.7.8)
Function necessary for competence development
MW, pI 77 kDa, 4.89
Gene length, protein length 2115 bp, 705 aa
Immediate neighbours rpsO, ylxY
Get the DNA and protein sequences
(Barbe et al., 2009)
Genetic context
PnpA context.gif
This image was kindly provided by SubtiList



The gene

Basic information

  • Coordinates:

Phenotypes of a mutant

Database entries

  • DBTBS entry: no entry
  • SubtiList entry: [1]

Additional information

The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity: 3'-5' exoribonuclease
  • Protein family:
  • Paralogous protein(s):

Extended information on the protein

  • Kinetic information:
  • Domains:
  • Modification:
  • Cofactor(s):
  • Effectors of protein activity:
  • Localization:

Database entries

  • Structure: 3CDI (protein from E. coli), 3GCM (protein from E. coli, PNPase/RNase E micro-domain/RNA tetragonal crystal form )
  • Swiss prot entry:
  • E.C. number:

Additional information

required for the expression of late competence genes comG and comK, requirement bypassed by a mecA disruption; may be necessary for modification of the srfA transcript (stabilization or translation activation)

Expression and regulation

  • Operon:
  • Regulation: RelA dependent downregulation (Class I) during stringent response PubMed
  • Regulatory mechanism:
  • Additional information:

Biological materials

  • Mutant:
  • Expression vector:
  • lacZ fusion:
  • GFP fusion:
  • two-hybrid system: B. pertussis adenylate cyclase-based bacterial two hybrid system (BACTH), available in Stülke lab
  • Antibody:

Labs working on this gene/protein

David Bechhofer, Mount Sinai School, New York, USA Homepage

Your additional remarks

References

Paula P Cardenas, Begoña Carrasco, Humberto Sanchez, Gintaras Deikus, David H Bechhofer, Juan C Alonso
Bacillus subtilis polynucleotide phosphorylase 3'-to-5' DNase activity is involved in DNA repair.
Nucleic Acids Res: 2009, 37(12);4157-69
[PubMed:19433509] [WorldCat.org] [DOI] (I p)

Salima Nurmohamed, Bhamini Vaidialingam, Anastasia J Callaghan, Ben F Luisi
Crystal structure of Escherichia coli polynucleotide phosphorylase core bound to RNase E, RNA and manganese: implications for catalytic mechanism and RNA degradosome assembly.
J Mol Biol: 2009, 389(1);17-33
[PubMed:19327365] [WorldCat.org] [DOI] (I p)

Fabian M Commichau, Fabian M Rothe, Christina Herzberg, Eva Wagner, Daniel Hellwig, Martin Lehnik-Habrink, Elke Hammer, Uwe Völker, Jörg Stülke
Novel activities of glycolytic enzymes in Bacillus subtilis: interactions with essential proteins involved in mRNA processing.
Mol Cell Proteomics: 2009, 8(6);1350-60
[PubMed:19193632] [WorldCat.org] [DOI] (I p)

Juan Campos-Guillén, Patricia Bralley, George H Jones, David H Bechhofer, Gabriela Olmedo-Alvarez
Addition of poly(A) and heteropolymeric 3' ends in Bacillus subtilis wild-type and polynucleotide phosphorylase-deficient strains.
J Bacteriol: 2005, 187(14);4698-706
[PubMed:15995184] [WorldCat.org] [DOI] (P p)

Irina A Oussenko, Teppei Abe, Hiromi Ujiie, Akira Muto, David H Bechhofer
Participation of 3'-to-5' exoribonucleases in the turnover of Bacillus subtilis mRNA.
J Bacteriol: 2005, 187(8);2758-67
[PubMed:15805522] [WorldCat.org] [DOI] (P p)

Gintaras Deikus, Paul Babitzke, David H Bechhofer
Recycling of a regulatory protein by degradation of the RNA to which it binds.
Proc Natl Acad Sci U S A: 2004, 101(9);2747-51
[PubMed:14976255] [WorldCat.org] [DOI] (P p)

D H Bechhofer, W Wang
Decay of ermC mRNA in a polynucleotide phosphorylase mutant of Bacillus subtilis.
J Bacteriol: 1998, 180(22);5968-77
[PubMed:9811656] [WorldCat.org] [DOI] (P p)

W Wang, D H Bechhofer
Properties of a Bacillus subtilis polynucleotide phosphorylase deletion strain.
J Bacteriol: 1996, 178(8);2375-82
[PubMed:8636041] [WorldCat.org] [DOI] (P p)

S Mitra, K Hue, D H Bechhofer
In vitro processing activity of Bacillus subtilis polynucleotide phosphorylase.
Mol Microbiol: 1996, 19(2);329-42
[PubMed:8825778] [WorldCat.org] [DOI] (P p)

M P Deutscher, N B Reuven
Enzymatic basis for hydrolytic versus phosphorolytic mRNA degradation in Escherichia coli and Bacillus subtilis.
Proc Natl Acad Sci U S A: 1991, 88(8);3277-80
[PubMed:1707536] [WorldCat.org] [DOI] (P p)


  1. Author1, Author2 & Author3 (year) Title Journal volume: page-page. PubMed