Mfd

• Description: transcription-repair coupling factor
  
  

Gene name	mfd
Synonyms
Essential	no
Product	transcription-repair coupling factor
Function	promotes strand-specific DNA repair by displacing RNA polymerase stalled at a nucleotide lesion and directing the (A)BC excinuclease to the RNA damage site
Interactions involving this protein in SubtInteract: Mfd
MW, pI	133 kDa, 5.367
Gene length, protein length	3531 bp, 1177 aa
Immediate neighbours	fin, spoVT
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

Categories containing this gene/protein

DNA repair/ recombination, transcription

The gene

Basic information

• Locus tag: BSU00550

Phenotypes of a mutant

In an mfd knock-out, the cell's ability to accumulate adaptive mutations in stationary phase is depressed. PubMed

Database entries

• DBTBS entry: no entry

• SubtiList entry: [1]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:
  • promotes strand-specific DNA repair by displacing RNA polymerase stalled at a nucleotide lesion and directing the (A)BC excinuclease to the RNA damage site
  • is required for roadblock transcription repression by transcription factors with binding sites downstream of the promoter (as for CcpA PubMed and CodY PubMed)

• Protein family:

• Paralogous protein(s): RecG

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:
  • Mfd interacts with the RNA polymerase PubMed
  • Mfd-UvrA PubMed
  • Mfd-RpoB PubMed

• Localization:

Database entries

• Structure:
  • 2EYQ (Mfd from E. coli) PubMed
  • 3MLQ (RNA polymerase interacting domain of Thermus thermophilus Mfd with the Thermus aquaticus RpoB beta1 domain) PubMed

• UniProt: P37474

• KEGG entry: [2]

• E.C. number:

Expression and regulation

• Operon:

• Sigma factor:

• Regulation:

• Regulatory mechanism:

• Additional information:

Biological materials

• Mutant: GP1167 (del ermC), available in Stülke lab

• Expression vector:

• lacZ fusion:

• GFP fusion: GP1510 (spc, based on pGP1870, pGP1389-derivative ), available in the Stülke lab

• YFP fusion: GP1511 (spc, based on pGP1871, pGP1389-derivative ), available in the Stülke lab

• two-hybrid system:

• Antibody:

• Strep-tag construct: GP890 (spc, based on pGP1389), available in the Stülke lab

References

Reviews

Philip C Hanawalt, Graciela Spivak
Transcription-coupled DNA repair: two decades of progress and surprises.
Nat Rev Mol Cell Biol: 2008, 9(12);958-70
[PubMed:19023283] [WorldCat.org] [DOI] (I p)

Rodrigo S Galhardo, P J Hastings, Susan M Rosenberg
Mutation as a stress response and the regulation of evolvability.
Crit Rev Biochem Mol Biol: 2007, 42(5);399-435
[PubMed:17917874] [WorldCat.org] [DOI] (P p)

Alexandra M Deaconescu, Nigel Savery, Seth A Darst
The bacterial transcription repair coupling factor.
Curr Opin Struct Biol: 2007, 17(1);96-102
[PubMed:17239578] [WorldCat.org] [DOI] (P p)

James J Truglio, Deborah L Croteau, Bennett Van Houten, Caroline Kisker
Prokaryotic nucleotide excision repair: the UvrABC system.
Chem Rev: 2006, 106(2);233-52
[PubMed:16464004] [WorldCat.org] [DOI] (P p)

Sergei Borukhov, Jookyung Lee, Oleg Laptenko
Bacterial transcription elongation factors: new insights into molecular mechanism of action.
Mol Microbiol: 2005, 55(5);1315-24
[PubMed:15720542] [WorldCat.org] [DOI] (P p)

Jeffrey Roberts, Joo-Seop Park
Mfd, the bacterial transcription repair coupling factor: translocation, repair and termination.
Curr Opin Microbiol: 2004, 7(2);120-5
[PubMed:15063847] [WorldCat.org] [DOI] (P p)

E C Friedberg
Relationships between DNA repair and transcription.
Annu Rev Biochem: 1996, 65;15-42
[PubMed:8811173] [WorldCat.org] [DOI] (P p)

C P Selby, A Sancar
Mechanisms of transcription-repair coupling and mutation frequency decline.
Microbiol Rev: 1994, 58(3);317-29
[PubMed:7968917] [WorldCat.org] [DOI] (P p)

Original Articles

Additional publications: PubMed