Crystal structure of aminotransferase CrmG from Actinoalloteichus sp. WH1-2216-6 in complex with amino donor L-Ala

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 

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Structural studies reveal flexible roof of active site responsible for omega-transaminase CrmG overcoming by-product inhibition.

Xu, J.Tang, X.Zhu, Y.Yu, Z.Su, K.Zhang, Y.Dong, Y.Zhu, W.Zhang, C.Wu, R.Liu, J.

(2020) Commun Biol 3: 455-455

  • DOI: https://doi.org/10.1038/s42003-020-01184-w
  • Primary Citation of Related Structures:  
    6JC7, 6JC8, 6JC9, 6JCA, 6JCB

  • PubMed Abstract: 

    Amine compounds biosynthesis using ω-transaminases has received considerable attention in the pharmaceutical industry. However, the application of ω-transaminases was hampered by the fundamental challenge of severe by-product inhibition. Here, we report that ω-transaminase CrmG from Actinoalloteichus cyanogriseus WH1-2216-6 is insensitive to inhibition from by-product α-ketoglutarate or pyruvate. Combined with structural and QM/MM studies, we establish the detailed catalytic mechanism for CrmG. Our structural and biochemical studies reveal that the roof of the active site in PMP-bound CrmG is flexible, which will facilitate the PMP or by-product to dissociate from PMP-bound CrmG. Our results also show that amino acceptor caerulomycin M (CRM M), but not α-ketoglutarate or pyruvate, can form strong interactions with the roof of the active site in PMP-bound CrmG. Based on our results, we propose that the flexible roof of the active site in PMP-bound CrmG may facilitate CrmG to overcome inhibition from the by-product.

  • Organizational Affiliation

    School of Pharmaceutical Sciences, Sun Yat-sen University, 510006, Guangzhou, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
523Actinoalloteichus sp. WH1-2216-6Mutation(s): 0 
Find proteins for H8Y6N2 (Actinoalloteichus sp. WH1-2216-6)
Explore H8Y6N2 
Go to UniProtKB:  H8Y6N2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupH8Y6N2
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on F0G

Download Ideal Coordinates CCD File 
E [auth A],
J [auth B],
N [auth C],
Q [auth D]
C11 H15 N2 O7 P
Query on GOL

Download Ideal Coordinates CCD File 
F [auth A]
G [auth A]
H [auth A]
I [auth A]
O [auth C]
F [auth A],
G [auth A],
H [auth A],
I [auth A],
O [auth C],
R [auth D]
C3 H8 O3
Query on ACY

Download Ideal Coordinates CCD File 
K [auth B],
L [auth B],
M [auth B],
P [auth C]
C2 H4 O2
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.761α = 106.48
b = 83.653β = 109.07
c = 87.975γ = 95.12
Software Package:
Software NamePurpose
Aimlessdata scaling
PDB_EXTRACTdata extraction
DIALSdata reduction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31500638

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-05
    Type: Initial release
  • Version 1.1: 2020-09-16
    Changes: Database references
  • Version 1.2: 2023-11-22
    Changes: Data collection, Database references, Refinement description