8JNX

alkaline amylase Amy703 with truncated of N-terminus domain

• PDB DOI: https://doi.org/10.2210/pdb8JNX/pdb

• Classification: HYDROLASE
• Organism(s): Alkalihalophilus pseudofirmus OF4
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2023-06-06 Released: 2023-12-13 
• Deposition Author(s): Xiang, L., Zhang, G., Zhou, J.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.245 
• R-Value Work: 0.207 
• R-Value Observed: 0.209 

Literature

Truncation of N-terminus domain of alkaline a-amylase to form a unique dimer leads to improved activity and stability and decreased calcium ion dependence

Xiang, L., Zhang, G., Zhou, J.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 75.52 kDa 
• Atom Count: 5,326 
• Modelled Residue Count: 662 
• Deposited Residue Count: 662 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-amylase	A	662	Alkalihalophilus pseudofirmus OF4	Mutation(s): 0  Gene Names: amy
UniProt
Find proteins for A0A023I4U3 (Alkalihalophilus pseudofirmus) Explore A0A023I4U3  Go to UniProtKB:  A0A023I4U3

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA (Subject of Investigation/LOI)	B [auth A], C [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.245 
• R-Value Work: 0.207 
• R-Value Observed: 0.209 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 171.307	α = 90
b = 171.307	β = 90
c = 167.17	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-3000	data reduction
HKL-3000	data scaling
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-12-13 
Deposition Author(s): Xiang, L., Zhang, G., Zhou, J.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	31670069

Revision History  

• Version 1.0: 2023-12-13
  Type: Initial release