Cis Element:dif: Difference between revisions

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===Notes===
===Notes===
Sites where XerCD bind and cleave ''dif'' can be found in Blakely ''et al.'' (1997)<ref name='PMID:8995522'/>.


== Mutant alleles and phenotypes ==
== Mutant alleles and phenotypes ==

Revision as of 19:21, 29 June 2010

Cis element summary table

Standard Name

dif

Synonyms

deletion-induced filamentation

Function

Recombination site in terminus

Location
  • 34.2 minutes in MG1655
  • 33.6 minutes in AB1157 [1]
SO terms


Notes

Location and Sequence

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Strain Map location Genome coordinates Genome browsers Sequence links

MG1655

34.2 minutes

MG1655: 1588774..1588801
gbrowse_img.php?coord=1588774..1588801&genome=ecoli&name=MG1655&trackset=DNA_unlabeled&width=300&.png


Notes

The site is a 28bp sequence located in the "dif activity zone" (DAZ) and is involved in Chromosome Dimer Resolution involving XerCD. dif must be located in the terminus region for proper function and may be functionally replaced by loxP if the Cre recombinase is supplied in trans[2].

Interactions

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Partner Type Partner Notes References Evidence

Protein

XerC

PMID:11114887[3]

Protein

XerD

PMID:11114887[3]



Notes

Sites where XerCD bind and cleave dif can be found in Blakely et al. (1997)[4].

Mutant alleles and phenotypes

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Allele Nt change(s) Phenotype: Type Phenotype: Description Reference Availability Comments

Δdif

Growth Phenotype

  • subpopulation of filamentous cells with abnormal nucleoids
  • induction of the SOS repair system

PMID:1657123[1]



Notes

Genetic Resources

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Resource Resource Type Source Notes/Reference

pSDC124

Plasmid Clone

pUC18-based dif reporter

PMID:1931824[5]

pFC238

Plasmid Clone

pGB2-based dif reporter

PMID:10523315[6]

pFH127

Plasmid Clone

pGB2ts-based dif reporter carrying one dif site

PMID:9067608[7]

NL Strains

Strain

This paper lists a variety of different dif deletions and other constructs designed to test the dif locus

PMID:7729430[2]

pUC-dif

Plasmid Clone

pUC18-based dif reporter

PMID:17805344[8]

GR35

Strain

AB1157difΔ6

PMID:10523315[6]

GR47

Strain

AB1157lexA3difΔ6

PMID:10523315[6]

Notes

  • One way to test the resolution competency at the dif activity zone (DAZ) or individual dif sites is to perform plasmid dimer resolution assays[9], or dif-Km-dif excision assays[10].

Accessions

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Database Accession Notes

eric

dif



Notes

References

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  1. ↑ 1.0 1.1 Kuempel, PL et al. (1991) dif, a recA-independent recombination site in the terminus region of the chromosome of Escherichia coli. New Biol. 3 799-811 PubMed
  2. ↑ 2.0 2.1 Leslie, NR & Sherratt, DJ (1995) Site-specific recombination in the replication terminus region of Escherichia coli: functional replacement of dif. EMBO J. 14 1561-70 PubMed
  3. ↑ 3.0 3.1 Barre, FX et al. (2000) FtsK functions in the processing of a Holliday junction intermediate during bacterial chromosome segregation. Genes Dev. 14 2976-88 PubMed
  4. ↑ Blakely, GW et al. (1997) Binding and cleavage of nicked substrates by site-specific recombinases XerC and XerD. J. Mol. Biol. 265 30-9 PubMed
  5. ↑ Blakely, G et al. (1991) Escherichia coli XerC recombinase is required for chromosomal segregation at cell division. New Biol. 3 789-98 PubMed
  6. ↑ 6.0 6.1 6.2 Recchia, GD et al. (1999) FtsK-dependent and -independent pathways of Xer site-specific recombination. EMBO J. 18 5724-34 PubMed
  7. ↑ Hayes, F & Sherratt, DJ (1997) Recombinase binding specificity at the chromosome dimer resolution site dif of Escherichia coli. J. Mol. Biol. 266 525-37 PubMed
  8. ↑ Grainge, I et al. (2007) Unlinking chromosome catenanes in vivo by site-specific recombination. EMBO J. 26 4228-38 PubMed
  9. ↑ Yates, J et al. (2003) Species specificity in the activation of Xer recombination at dif by FtsK. Mol. Microbiol. 49 241-9 PubMed
  10. ↑ Pérals, K et al. (2000) Functional polarization of the Escherichia coli chromosome terminus: the dif site acts in chromosome dimer resolution only when located between long stretches of opposite polarity. Mol. Microbiol. 36 33-43 PubMed

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