3D7Q

Crystal structure of a xisi-like protein (npun_ar114) from nostoc punctiforme pcc 73102 at 2.30 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history

Literature

Site-specific recombination of nitrogen-fixation genes in cyanobacteria by XisF-XisH-XisI complex: Structures and models.

Hwang, W.C.Golden, J.W.Pascual, J.Xu, D.Cheltsov, A.Godzik, A.

(2014) Proteins --: --

  • DOI: 10.1002/prot.24679
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Nitrogen fixation is an important process that converts atmospheric gaseous nitrogen, a form plants cannot utilize, into ammonia that can be easily assimilated. Large serine recombinase XisF (fdxN element site-specific recombinase), together with con ...

    Nitrogen fixation is an important process that converts atmospheric gaseous nitrogen, a form plants cannot utilize, into ammonia that can be easily assimilated. Large serine recombinase XisF (fdxN element site-specific recombinase), together with controlling factors XisH and XisI, plays a critical role in the expression of nitrogen fixation genes of certain Anabaena and Nostoc species of cyanobacteria. All three proteins are required to excise the fdxN DNA element from the chromosome in differentiating heterocysts for the expression of nitrogen fixation related genes. We report the first crystal structures of XisH and XisI proteins, both adopting novel protein folds. Based on the analysis of their sequences and structures, we propose that XisH and XisI proteins function as endonucleases and recombination directionality factors (RDFs), respectively. © Proteins 2014;. © 2014 Wiley Periodicals, Inc.


    Organizational Affiliation

    Joint Center for Structural Genomics, http://www.jcsg.org, USA; Bioinformatics and Systems Biology Program, Sanford Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
XisI protein-like
A, B
112Nostoc punctiforme (strain ATCC 29133 / PCC 73102)Mutation(s): 0 
Find proteins for B2JAN5 (Nostoc punctiforme (strain ATCC 29133 / PCC 73102))
Go to UniProtKB:  B2JAN5
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 79.846α = 90.00
b = 79.846β = 90.00
c = 74.256γ = 90.00
Software Package:
Software NamePurpose
MolProbitymodel building
SCALAdata scaling
PDB_EXTRACTdata extraction
autoSHARPphasing
SHELXDphasing
MOSFLMdata reduction
REFMACrefinement
SHELXphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-06-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2014-09-10
    Type: Database references
  • Version 1.3: 2015-10-14
    Type: Database references
  • Version 1.4: 2015-12-23
    Type: Database references
  • Version 1.5: 2017-10-25
    Type: Refinement description