3SGA | pdb_00003sga

STRUCTURES OF PRODUCT AND INHIBITOR COMPLEXES OF STREPTOMYCES GRISEUS PROTEASE A AT 1.8 ANGSTROMS RESOLUTION. A MODEL FOR SERINE PROTEASE CATALYSIS

• PDB DOI: https://doi.org/10.2210/pdb3SGA/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Streptomyces griseus
• Mutation(s): No 


• Deposited: 1990-05-29 Released: 1991-10-15 
• Deposition Author(s): Sielecki, A.R., James, M.N.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Observed: 
  0.120 (Depositor) 

Literature

Structures of product and inhibitor complexes of Streptomyces griseus protease A at 1.8 A resolution. A model for serine protease catalysis.

James, M.N., Sielecki, A.R., Brayer, G.D., Delbaere, L.T., Bauer, C.A.

(1980) J Mol Biology 144: 43-88

• PubMed: 6783761 
• DOI: https://doi.org/10.1016/0022-2836(80)90214-4
• Primary Citation Related Structures: 
  3SGA, 4SGA, 5SGA

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content 

• Total Structure Weight: 18.46 kDa 
• Atom Count: 1,483 
• Modeled Residue Count: 186 
• Deposited Residue Count: 186 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEINASE A (SGPA)	A [auth E]	181	Streptomyces griseus	Mutation(s): 0  Gene Names: sprA EC: 3.4.21.80
UniProt
Find proteins for P00776 (Streptomyces griseus) Explore P00776  Go to UniProtKB:  P00776

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
ACE-PRO-ALA-PRO-PHE-ALDEHYDE	B [auth P]	5	N/A	Mutation(s): 0

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PHL	B [auth P]	L-PEPTIDE LINKING	C9 H13 N O		PHE

Biologically Interesting Molecules (External Reference) 

1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_000421	B [auth P]	ACE-PRO-ALA-PRO-PHE-ALDEHYDE, BOUND FORM	Peptide-like / Inhibitor

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Observed: 0.120 (Depositor) 

Space Group: P 4₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.18	α = 90
b = 55.18	β = 90
c = 54.66	γ = 90

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1991-10-15 
Deposition Author(s): Sielecki, A.R., James, M.N.G.

Revision History  

• Version 1.0: 1991-10-15
  Type: Initial release
  
• Version 1.1: 2008-03-25
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
• Version 1.3: 2012-09-19
  Changes: Structure summary
• Version 1.4: 2012-12-12
  Changes: Other
• Version 1.5: 2024-06-05
  Changes: Data collection, Database references, Derived calculations, Other, Structure summary