9AW8

Crystal structure of trypsin at 150 Kelvin with benzamidine

• PDB DOI: https://doi.org/10.2210/pdb9AW8/pdb

• Classification: HYDROLASE
• Organism(s): Bos taurus
• Expression System: Bos taurus
• Mutation(s): No 


• Deposited: 2024-03-05 Released: 2025-03-12 
• Deposition Author(s): Lima, L.M.T.R., de Sa Ribeiro, F.
• Funding Organization(s): Brazilian National Council for Scientific and Technological Development (CNPq)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 
  0.214 (Depositor), 0.213 (DCC) 
• R-Value Work: 
  0.177 (Depositor), 0.176 (DCC) 

Starting Model: experimental

Literature

Crystal structure of trypsin at 150 Kelvin with benzamidine

Lima, L.M.T.R., de Sa Ribeiro, F.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 23.7 kDa 
• Atom Count: 1,967 
• Modelled Residue Count: 223 
• Deposited Residue Count: 223 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cationic trypsin	A	223	Bos taurus	Mutation(s): 0  EC: 3.4.21.4
UniProt
Find proteins for P00760 (Bos taurus) Explore P00760  Go to UniProtKB:  P00760

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BEN (Subject of Investigation/LOI)	C [auth A], D [auth A]	BENZAMIDINE C7 H8 N2 PXXJHWLDUBFPOL-UHFFFAOYSA-N
GOL (Subject of Investigation/LOI)	E [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
CA (Subject of Investigation/LOI)	B [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free:  0.214 (Depositor), 0.213 (DCC) 
• R-Value Work:  0.177 (Depositor), 0.176 (DCC) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 53.658	α = 90
b = 57.15	β = 90
c = 64.795	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
SAINT	data reduction
SCALA	data scaling
MOLREP	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-03-12 
Deposition Author(s): Lima, L.M.T.R., de Sa Ribeiro, F.

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Funding Organization	Location	Grant Number
Brazilian National Council for Scientific and Technological Development (CNPq)	Brazil	--

Revision History  

• Version 1.0: 2025-03-12
  Type: Initial release