1SAT

CRYSTAL STRUCTURE OF THE 50 KDA METALLO PROTEASE FROM S. MARCESCENS

• PDB DOI: https://doi.org/10.2210/pdb1SAT/pdb

• Classification: HYDROLASE (SERINE PROTEASE)
• Organism(s): Serratia marcescens
• Mutation(s): No 


• Deposited: 1994-07-04 Released: 1995-07-31 
• Deposition Author(s): Baumann, U.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Work: 0.188 
• R-Value Observed: 0.188 

Literature

Crystal structure of the 50 kDa metallo protease from Serratia marcescens.

Baumann, U.

(1994) J Mol Biol 242: 244-251

• PubMed: 8089845 
• DOI: https://doi.org/10.1006/jmbi.1994.1576
• Primary Citation of Related Structures:  
  1SAT


• PubMed Abstract: 
  

  The crystal structure of the 50 kDa metalloprotease from the Gram-negative bacterium Serratia marcescens has been solved and refined to a crystallographic R-factor of 0.192 at 1.80 A resolution. The structure is very similar to that of alkaline protease from Pseudomonas aeruginosa, in particular the calcium binding "parallel beta roll" motif is completely conserved. The N-terminal proteolytic domain shows the typical "metzincin" fold. The active sites of the two enzymes are slightly different, Tyr216 is a Zn ligand in the Serratia metallo protease. The loops 70-77 and 122-132, which encompass the active site cleft, differ due to insertions and deletions so that the Serratia metallo protease seems to have a more open site than the alkaline protease.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 50.66 kDa 
• Atom Count: 3,741 
• Modelled Residue Count: 468 
• Deposited Residue Count: 471 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SERRATIA PROTEASE	A	471	Serratia marcescens	Mutation(s): 0
UniProt
Find proteins for P23694 (Serratia marcescens) Explore P23694  Go to UniProtKB:  P23694

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
CA	C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Work: 0.188 
• R-Value Observed: 0.188 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 151	α = 90
b = 109.2	β = 90
c = 42.6	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1995-07-31 
Deposition Author(s): Baumann, U.

Revision History  

• Version 1.0: 1995-07-31
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations, Other