Solution structure of the lambda integrase amino-terminal domain

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.4 of the entry. See complete history


Arm-site binding by lambda -integrase: solution structure and functional characterization of its amino-terminal domain.

Wojciak, J.M.Sarkar, D.Landy, A.Clubb, R.T.

(2002) Proc Natl Acad Sci U S A 99: 3434-3439

  • DOI: https://doi.org/10.1073/pnas.052017999
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The integrase protein (Int) from bacteriophage lambda catalyzes the insertion and excision of the viral genome into and out of Escherichia coli. It is a member of the lambda-Int family of site-specific recombinases that catalyze a diverse array of DNA rearrangements in archaebacteria, eubacteria, and yeast and belongs to the subset of this family that possesses two autonomous DNA-binding domains. The heterobivalent properties of Int can be decomposed into a carboxyl-terminal domain that executes the DNA cleavage and ligation reactions and a smaller amino-terminal domain that binds to an array of conserved DNA sites within the phage arms, thereby arranging Int protomers within the higher-order recombinogenic complex. We have determined that residues Met-1 to Leu-64 of Int constitute the minimal arm-type DNA-binding domain (INT-DBD(1-64)) and solved the solution structure by using NMR. We show that the INT-DBD(1-64) is a novel member of the growing family of three-stranded beta-sheet DNA-binding proteins, because it supplements this motif with a disordered amino-terminal basic tail that is important for arm-site binding. A model of the arm-DNA-binding domain recognizing its cognate DNA site is proposed on the basis of similarities with the analogous domain of Tn916 Int and is discussed in relation to other features of the protein.

  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California at Los Angeles, CA 90095-1570, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
integrase64Lambdavirus lambdaMutation(s): 0 
Find proteins for P03700 (Escherichia phage lambda)
Explore P03700 
Go to UniProtKB:  P03700
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03700
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-03-27
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Database references, Derived calculations
  • Version 1.4: 2024-05-22
    Changes: Data collection