1TT9 | pdb_00001tt9

Structure of the bifunctional and Golgi associated formiminotransferase cyclodeaminase octamer

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free: 
    0.293 (Depositor) 
  • R-Value Work: 
    0.251 (Depositor) 
  • R-Value Observed: 
    0.251 (Depositor) 

wwPDB Validation 3D Report Full Report

Validation slider image for 1TT9

This is version 1.5 of the entry. See complete history. 

Re-refinement Note

A newer entry is available that reflects an alternative modeling of the original data: 2PFD

Literature

Structure of the bifunctional and Golgi-associated formiminotransferase cyclodeaminase octamer

Mao, Y., Vyas, N.K., Vyas, M.N., Chen, D.H., Ludtke, S.J., Chiu, W., Quiocho, F.A.

(2004) EMBO J 23: 2963-2971

  • DOI: https://doi.org/10.1038/sj.emboj.7600327
  • Primary Citation Related Structures: 
    1TT9

  • PubMed Abstract: 

    Mammalian formiminotransferase cyclodeaminase (FTCD), a 0.5 million Dalton homo-octameric enzyme, plays important roles in coupling histidine catabolism with folate metabolism and integrating the Golgi complex with the vimentin intermediate filament cytoskeleton. It is also linked to two human diseases, autoimmune hepatitis and glutamate formiminotransferase deficiency. Determination of the FTCD structure by X-ray crystallography and electron cryomicroscopy revealed that the eight subunits, each composed of distinct FT and CD domains, are arranged like a square doughnut. A key finding indicates that coupling of three subunits governs the octamer-dependent sequential enzyme activities, including channeling of intermediate and conformational change. The structure further shed light on the molecular nature of two strong antigenic determinants of FTCD recognized by autoantibodies from patients with autoimmune hepatitis and on the binding of thin vimentin filaments to the FTCD octamer.

    • Organizational Affiliation: 
    • Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA.

Macromolecule Content 

  • Total Structure Weight: 237.42 kDa 
  • Atom Count: 2,160 
  • Modeled Residue Count: 2,160 
  • Deposited Residue Count: 2,164 
  • Unique protein chains: 1

Macromolecules

Find similar proteins by:
|  3D Structure
Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
Formimidoyltransferase-cyclodeaminase (Formiminotransferase- cyclodeaminase) (FTCD) (58 kDa microtubule-binding protein)
A, B, C, D
541Rattus norvegicusMutation(s): 8 
Gene Names: Ftcd
EC: 2.1.2.5 (PDB Primary Data), 4.3.1.4 (PDB Primary Data)
UniProt
Find proteins for O88618 (Rattus norvegicus)
Explore O88618 
Go to UniProtKB:  O88618
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO88618
Sequence Annotations
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Reference Sequence

Small Molecules

Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free:  0.293 (Depositor) 
  • R-Value Work:  0.251 (Depositor) 
  • R-Value Observed: 0.251 (Depositor) 
Space Group: P 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 134.848α = 90
b = 134.848β = 90
c = 156.365γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
SnBphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-06-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2024-02-14
    Changes: Data collection, Database references
  • Version 1.5: 2024-11-13
    Changes: Structure summary