Biological Assembly 1  

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Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 116721.49 
• Atom Count: 7873 
• Residue Count: 1056 
• Unique protein chains: 1

1NBA

CRYSTAL STRUCTURE ANALYSIS, REFINEMENT AND ENZYMATIC REACTION MECHANISM OF N-CARBAMOYLSARCOSINE AMIDOHYDROLASE FROM ARTHROBACTER SP. AT 2.0 ANGSTROMS RESOLUTION

• DOI: 10.2210/pdb1NBA/pdb

• Classification: HYDROLASE(IN LINEAR AMIDES)
• Organism(s): Arthrobacter sp


• Deposited: 1992-05-18 Released: 1994-06-22 
• Deposition Author(s): Romao, M.J., Turk, D., Gomis-Ruth, F.-Z., Huber, R., Schumacher, G., Mollering, H., Russmann, L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Work: 0.186 

Literature

Crystal structure analysis, refinement and enzymatic reaction mechanism of N-carbamoylsarcosine amidohydrolase from Arthrobacter sp. at 2.0 A resolution.

Romao, M.J., Turk, D., Gomis-Ruth, F.X., Huber, R., Schumacher, G., Mollering, H., Russmann, L.

(1992) J.Mol.Biol. 226: 1111-1130

• PubMed: 1381445 


• PubMed Abstract: 
  

N-carbamoylsarcosine amidohydrolase from Arthrobacter sp., a tetramer of polypeptides with 264 amino acid residues each, has been crystallized and its structure solved and refined at 2.0 A resolution, to a crystallographic R-factor of 18.6%. The crystals employed in the analysis contain one tetramer of 116,000 M(r) in the asymmetric unit. The structure determination proceeded by multiple isomorphous replacement, followed by solvent-flattening and density averaging about the local diads within the tetramer. In the final refined model, the root-mean-square deviation from ideality is 0.01 A for bond distances and 2.7 degrees for bond angles. The asymmetric unit consists of 7853 protein atoms, 431 water molecules and four sulfate ions bound into the putative active site clefts in each subunit. One subunit contains a central six-stranded parallel beta-pleated sheet packed by helices on both sides. On one side, two helices face the solvent, while two of the helices on the other side are buried in the tight intersubunit contacts. The catalytic center of the enzyme, tentatively identified by inhibitor binding, is located at the interface between two subunits and involves residues from both. It is suggested that the nucleophilic group involved in hydrolysis of the substrate is the thiol group of Cys117 and a nucleophilic addition-elimination mechanism is proposed.

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Organizational Affiliation: 

Max-Planck-Institut für Biochemie, Martinsried, Germany.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
N-CARBAMOYLSARCOSINE AMIDOHYDROLASE	A, B, C, D	264	Arthrobacter sp	Mutation(s): 0  EC: 3.5.1.59
Find proteins for P32400 (Arthrobacter sp) Go to UniProtKB:  P32400

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A, B, C, D	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Work: 0.186 
• Space Group: C 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 136.220	α = 90.00
b = 122.290	β = 91.82
c = 70.870	γ = 90.00

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1992-05-18 
• Released Date: 1994-06-22 
• Deposition Author(s): Romao, M.J., Turk, D., Gomis-Ruth, F.-Z., Huber, R., Schumacher, G., Mollering, H., Russmann, L.

Revision History 

• Version 1.0: 1994-06-22
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance