7XMJ

Crystal structure of carbohydrate esterase family 7 acetyl xylan esterase

• PDB DOI: https://doi.org/10.2210/pdb7XMJ/pdb
• Entry: 7XMJ supersedes: 7CUZ

• Classification: STRUCTURAL PROTEIN
• Organism(s): Lactococcus lactis subsp. lactis KF147
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2022-04-26 Released: 2023-05-31 
• Deposition Author(s): Jiang, Z.Q., Ma, J.W.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.41 Å
• R-Value Free: 0.280 
• R-Value Work: 0.248 
• R-Value Observed: 0.250 

Literature

Crystal structure of carbohydrate esterase family 7 acetyl xylan esterase

Jiang, Z.Q., Ma, J.W.

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

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 143.37 kDa 
• Atom Count: 10,061 
• Modelled Residue Count: 1,218 
• Deposited Residue Count: 1,248 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Acetylxylan esterase	A, B, C, D	312	Lactococcus lactis subsp. lactis KF147	Mutation(s): 0  Gene Names: axe, LLKF_1447 EC: 3.1.1
UniProt
Find proteins for A9QSE8 (Lactococcus lactis subsp. lactis (strain KF147)) Explore A9QSE8  Go to UniProtKB:  A9QSE8

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	E [auth A], F [auth C], G [auth D]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.41 Å
• R-Value Free: 0.280 
• R-Value Work: 0.248 
• R-Value Observed: 0.250 
• Space Group: P 6₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 147.714	α = 90
b = 147.714	β = 90
c = 135.389	γ = 120

Software Package:

Software Name	Purpose
HKL-2000	data scaling
HKL-2000	data reduction
PHENIX	model building
PHENIX	refinement
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-05-31 
Deposition Author(s): Jiang, Z.Q., Ma, J.W.
• This entry supersedes: 7CUZ

---

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

Revision History  

• Version 1.0: 2023-05-31
  Type: Initial release
  
• Version 1.1: 2023-11-08
  Changes: Advisory, Data collection
• Version 1.2: 2023-11-29
  Changes: Refinement description