ISDA

Entry Detail

PDB ID:

1OH5

Keywords:

DNA BINDING

Title:

THE CRYSTAL STRUCTURE OF E. COLI MUTS BINDING TO DNA WITH A C:A MISMATCH

Biological Source:

Source Organism:

ESCHERICHIA COLI, synthetic construct

Host Organism:

ESCHERICHIA COLI

PDB Version:

Deposition Date:

2003-05-23

Release Date:

2003-08-08

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.90 Å

R-Value Free:

0.29

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:DNA MISMATCH REPAIR PROTEIN MUTS
Chain IDs:A, B
Chain Length:800
Number of Molecules:2
Biological Source:ESCHERICHIA COLI

UniProt ID:P23909 Pfam ID:PF01624, PF05188, PF05192, PF05190, PF00488

Polymer Type:polydeoxyribonucleotide
Description:5'-D(*AP*GP*CP*TP*GP*CP*CP*AP*CP*GP *CP*AP*CP*CP*AP*GP*TP*GP*TP*CP*AP*GP*CP*GP*TP *CP*CP*TP*AP*T)-3'
Chain IDs:C (auth: E)
Chain Length:30
Number of Molecules:1
Biological Source:synthetic construct

Polymer Type:polydeoxyribonucleotide
Description:5'-D(*AP*TP*AP*GP*GP*AP*CP*GP*CP*TP *GP*AP*CP*AP*CP*TP*GP*GP*TP*GP*CP*AP*TP*GP*GP *CP*AP*GP*CP*T)-3'
Chain IDs:D (auth: F)
Chain Length:30
Number of Molecules:1
Biological Source:synthetic construct

Ligand Molecules

ADP

Primary Citation

Structures of E. Coli DNA Mismatch Repair Enzyme Muts in Complex with Different Mismatches: A Common Recognition Mode for Diverse Substrates

Natrajan, G, Lamers, M.H, Enzlin, J.H, Winterwerp, H.H.K, Perrakis, A, Sixma, T.K, Lamers, M.H, Perrakis, A, Enzlin, J.H, Winterwerp, H.H, De Wind, N, Sixma, T.K.Show

Nucleic Acids Res. 31 4814 ? (2003)

PMID: 12907723 DOI: 10.1093/NAR/GKG677

Abstact

We have refined a series of isomorphous crystal structures of the Escherichia coli DNA mismatch repair enzyme MutS in complex with G:T, A:A, C:A and G:G mismatches and also with a single unpaired thymidine. In all these structures, the DNA is kinked by approximately 60 degrees upon protein binding. Two residues widely conserved in the MutS family are involved in mismatch recognition. The phenylalanine, Phe 36, is seen stacking on one of the mismatched bases. The same base is also seen forming a hydrogen bond to the glutamate Glu 38. This hydrogen bond involves the N7 if the base stacking on Phe 36 is a purine and the N3 if it is a pyrimidine (thymine). Thus, MutS uses a common binding mode to recognize a wide range of mismatches.

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Primary Citation of related structures