1CZU

REFINED STRUCTURES OF OXIDIZED FLAVODOXIN FROM ANACYSTIS NIDULANS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.147 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Refined structures of oxidized flavodoxin from Anacystis nidulans.

Drennan, C.L.Pattridge, K.A.Weber, C.H.Metzger, A.L.Hoover, D.M.Ludwig, M.L.

(1999) J.Mol.Biol. 294: 711-724

  • DOI: 10.1006/jmbi.1999.3151
  • Primary Citation of Related Structures:  1CZN, 1D03, 1OFV

  • PubMed Abstract: 
  • Flavodoxin from Anacystis nidulans (Synechococcus PCC 7942) was the first member of the flavodoxin family to be characterized, and is the structural prototype for the "long-chain" flavodoxins that have molecular masses of approximately 20 kDa. Crysta ...

    Flavodoxin from Anacystis nidulans (Synechococcus PCC 7942) was the first member of the flavodoxin family to be characterized, and is the structural prototype for the "long-chain" flavodoxins that have molecular masses of approximately 20 kDa. Crystal structure analyses and refinements of three orthorhombic forms of oxidized A. nidulans flavodoxin are reported, and salient features of the fold and the FMN binding site are compared with other flavodoxins. The structure of form I (wild-type: P212121, a=57.08 A, b=69.24 A, c=45.55 A), determined initially by multiple isomorphous replacement, has been refined to R=0.183 and R(free)=0.211 for data from 10.0 to 1.7 A resolution. Structures of form II (wild-type: P212121, a=60.05 A, b=65.85 A, c=51.36 A) and form III (Asn58Gly: P212121, a=51.30 A, b=59.15 A, c=94.44 A) have been determined by molecular replacement and refined versus data to 2.0 A and 1.85 A, respectively; the R values for forms II and III are 0.147 and 0.150. Changes in the molecular contacts that produce the alternative packings in these crystalline forms are analyzed. Deletion of the Asn side-chain in the mutant Asn58Gly removes an intermolecular stacking interaction and allows the alternative packing found in form III crystals. The functionally important 50's loop of the FMN binding site is less restrained by intermolecular contacts in these crystals but maintains the same conformation as in oxidized wild type protein. The structures reported here provide the starting point for structure-function studies of the reduced states and of mutants, described in the accompanying paper.


    Organizational Affiliation

    Department of Biological Chemistry and Biophysics Research Division, University of Michigan, 930 N. University Ave., Ann Arbor, MI 48109, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FLAVODOXIN
A
169Synechococcus elongatus (strain PCC 7942)Gene Names: isiB
Find proteins for P10340 (Synechococcus elongatus (strain PCC 7942))
Go to UniProtKB:  P10340
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMN
Query on FMN

Download SDF File 
Download CCD File 
A
FLAVIN MONONUCLEOTIDE
RIBOFLAVIN MONOPHOSPHATE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.147 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 60.050α = 90.00
b = 65.850β = 90.00
c = 51.360γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORmodel building
X-PLORrefinement
SDMSdata scaling
SDMSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-12-29
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance