2AFR | pdb_00002afr

The Crystal Structure of Putative Precorrin Isomerase CbiC in Cobalamin Biosynthesis

PDB DOI: https://doi.org/10.2210/pdb2AFR/pdb

Classification: ISOMERASE
Organism(s): Leptospira interrogans
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2005-07-26 Released: 2006-04-04
Deposition Author(s): Xue, Y., Wei, Z., Li, X.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.30 Å
R-Value Free:
0.284 (Depositor), 0.283 (DCC)
R-Value Work:
0.224 (Depositor), 0.223 (DCC)
R-Value Observed:
0.224 (Depositor)

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This is version 1.3 of the entry. See complete history.

Literature

The crystal structure of putative precorrin isomerase CbiC in cobalamin biosynthesis

Xue, Y., Wei, Z., Li, X., Gong, W.

(2006) J Struct Biol 153: 307-311

PubMed: 16427313 Search on PubMed
DOI: https://doi.org/10.1016/j.jsb.2005.11.011
Primary Citation Related Structures:
2AFR, 2AFV

PubMed Abstract:
The leptospira cbiC encodes the enzyme catalyzing the methyl rearrangement reaction of the cobalamin biosynthesis pathway. The protein has been cloned and overexpressed as a His-tagged recombinant protein in Escherichia coli. The crystal structures have been solved in two crystal forms (P4(2)2(1)2 and P3(1)21) diffracting to 3.0 and 2.3A resolution, respectively. The structures are similar to the precorrin-8x methyl mutase (CobH), an enzyme of the aerobic pathway to vitamin B12.

Organizational Affiliation

National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PR China.

Macromolecule Content

Total Structure Weight: 25.89 kDa
Atom Count: 1,729
Modeled Residue Count: 216
Deposited Residue Count: 231
Unique protein chains: 1

Macromolecules

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Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
cobalamin biosynthesis precorrin isomerase	A	231	Leptospira interrogans	Mutation(s): 0 EC: 5.4.1.2 (PDB Primary Data), 5.4.99.60 (UniProt)
UniProt
Find proteins for Q8EXP7 (Leptospira interrogans serogroup Icterohaemorrhagiae serovar Lai (strain 56601)) Explore Q8EXP7 Go to UniProtKB: Q8EXP7
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	Q8EXP7
Sequence Annotations Expand
Reference Sequence

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.30 Å
R-Value Free: 0.284 (Depositor), 0.283 (DCC)
R-Value Work: 0.224 (Depositor), 0.223 (DCC)
R-Value Observed: 0.224 (Depositor)

Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.885	α = 90
b = 55.885	β = 90
c = 142.551	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing

Structure Validation

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Entry History

Deposition Data

Released Date: 2006-04-04

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 2006-04-04
Type: Initial release
Version 1.1: 2008-04-30
Changes: Version format compliance
Version 1.2: 2011-07-13
Changes: Derived calculations, Version format compliance
Version 1.3: 2024-03-13
Changes: Data collection, Database references

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.