RecO

• Description: mediator of RecA binding to ssDNA, required for the formation of RecA DNA repair centers, , required for efficient survival and replication restart after replication-transcription conflicts
  
  

Gene name	recO
Synonyms	yqxN, yqfI
Essential	no
Product	mediator of RecA binding to ssDNA
Function	DNA repair/ recombination
Gene expression levels in SubtiExpress: recO
Interactions involving this protein in SubtInteract: RecO
MW, pI	29 kDa, 8.208
Gene length, protein length	765 bp, 255 aa
Immediate neighbours	glyQ, yqzL
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

DNA repair/ recombination

The gene

Basic information

• Locus tag: BSU25280

Phenotypes of a mutant

• drastically reduced survival of mature dormant spores after exposure to ultrahigh vacuum desiccation and ionizing radiation that induce single strand (ss) DNA nicks and double-strand breaks (DSBs) PubMed
• recO recJ double mutants are extremely sensitive against DNA damaging agents PubMed
• recO addA-addB double mutants are extremely sensitive against DNA damaging agents PubMed

Database entries

• BsubCyc: BSU25280

• DBTBS entry: no entry

• SubtiList entry: [1]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:
  • provides RecA access to ssDNA during chromosomal transformation (together with DprA) PubMed
  • catalyzes annealing of SsbA or SsbA/SsbB coated ssDNAs to allow the formation of DNA duplexes with tails during plasmid transformation PubMed
  • required for the formation of RecA DNA repair centers (together with RecR) PubMed

• Protein family: recO family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:
  • SsbA (bound to ssDNA) -RecO, this helps to dislodge SsbA and SsbB from ssDNA PubMed
  • RecR-RecO, RecR:RecO molecular ratio of 2:1 (as judged from other bacteria such as E. coli and Deinococcus radiodurans) PubMed

• Localization:
  • cytoplasm (according to Swiss-Prot)
  • localizes to the DNA entry pole during transformation PubMed

Database entries

• BsubCyc: BSU25280

• Structure:
  • 2V1C (the RecR-RecO complex from Deinococcus radiodurans, RecR: 52% identity, 78% similarity, RecO: 30%/ 58%) PubMed

• UniProt: P42095

• KEGG entry: [2]

• E.C. number:

Expression and regulation

• Operon:

• Expression browser: recO PubMed

• Sigma factor:

• Regulation:

• Regulatory mechanism:

• Additional information:

Biological materials

• Mutant:
  • 1A892 ( recO::cat), PubMed, available at BGSC

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Reviews

Justin S Lenhart, Jeremy W Schroeder, Brian W Walsh, Lyle A Simmons
DNA repair and genome maintenance in Bacillus subtilis.
Microbiol Mol Biol Rev: 2012, 76(3);530-64
[PubMed:22933559] [WorldCat.org] [DOI] (I p)

Original publications

Begoña Carrasco, Tribhuwan Yadav, Ester Serrano, Juan C Alonso
Bacillus subtilis RecO and SsbA are crucial for RecA-mediated recombinational DNA repair.
Nucleic Acids Res: 2015, 43(12);5984-97
[PubMed:26001966] [WorldCat.org] [DOI] (I p)

Samuel Million-Weaver, Ariana Nakta Samadpour, Houra Merrikh
Replication Restart after Replication-Transcription Conflicts Requires RecA in Bacillus subtilis.
J Bacteriol: 2015, 197(14);2374-82
[PubMed:25939832] [WorldCat.org] [DOI] (I p)

Justin S Lenhart, Eileen R Brandes, Jeremy W Schroeder, Roderick J Sorenson, Hollis D Showalter, Lyle A Simmons
RecO and RecR are necessary for RecA loading in response to DNA damage and replication fork stress.
J Bacteriol: 2014, 196(15);2851-60
[PubMed:24891441] [WorldCat.org] [DOI] (I p)

Ignacija Vlašić, Ramona Mertens, Elena M Seco, Begoña Carrasco, Silvia Ayora, Günther Reitz, Fabian M Commichau, Juan C Alonso, Ralf Moeller
Bacillus subtilis RecA and its accessory factors, RecF, RecO, RecR and RecX, are required for spore resistance to DNA double-strand break.
Nucleic Acids Res: 2014, 42(4);2295-307
[PubMed:24285298] [WorldCat.org] [DOI] (I p)

Tribhuwan Yadav, Begoña Carrasco, Angela R Myers, Nicholas P George, James L Keck, Juan C Alonso
Genetic recombination in Bacillus subtilis: a division of labor between two single-strand DNA-binding proteins.
Nucleic Acids Res: 2012, 40(12);5546-59
[PubMed:22373918] [WorldCat.org] [DOI] (I p)

Audrey Costes, François Lecointe, Stephen McGovern, Sophie Quevillon-Cheruel, Patrice Polard
The C-terminal domain of the bacterial SSB protein acts as a DNA maintenance hub at active chromosome replication forks.
PLoS Genet: 2010, 6(12);e1001238
[PubMed:21170359] [WorldCat.org] [DOI] (I e)

Candela Manfredi, Yuki Suzuki, Tribhuwan Yadav, Kunio Takeyasu, Juan C Alonso
RecO-mediated DNA homology search and annealing is facilitated by SsbA.
Nucleic Acids Res: 2010, 38(20);6920-9
[PubMed:20581116] [WorldCat.org] [DOI] (I p)

Dawit Kidane, Begoña Carrasco, Candela Manfredi, Katharina Rothmaier, Silvia Ayora, Serkalem Tadesse, Juan C Alonso, Peter L Graumann
Evidence for different pathways during horizontal gene transfer in competent Bacillus subtilis cells.
PLoS Genet: 2009, 5(9);e1000630
[PubMed:19730681] [WorldCat.org] [DOI] (I p)

Candela Manfredi, Begoña Carrasco, Silvia Ayora, Juan C Alonso
Bacillus subtilis RecO nucleates RecA onto SsbA-coated single-stranded DNA.
J Biol Chem: 2008, 283(36);24837-47
[PubMed:18599486] [WorldCat.org] [DOI] (P p)

Joanna Timmins, Ingar Leiros, Sean McSweeney
Crystal structure and mutational study of RecOR provide insight into its mode of DNA binding.
EMBO J: 2007, 26(13);3260-71
[PubMed:17581636] [WorldCat.org] [DOI] (P p)

Dawit Kidane, Humberto Sanchez, Juan C Alonso, Peter L Graumann
Visualization of DNA double-strand break repair in live bacteria reveals dynamic recruitment of Bacillus subtilis RecF, RecO and RecN proteins to distinct sites on the nucleoids.
Mol Microbiol: 2004, 52(6);1627-39
[PubMed:15186413] [WorldCat.org] [DOI] (P p)