7CB3

Crystal structure of type III polyketide synthase from Mycobacterium marinum

• PDB DOI: https://doi.org/10.2210/pdb7CB3/pdb

• Classification: TRANSFERASE
• Organism(s): Mycobacterium marinum M
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2020-06-10 Released: 2022-06-15 
• Deposition Author(s): Pratap, S., Kant, A., Saxena, P., Krishnan, V.
• Funding Organization(s): Department of Science & Technology (DST, India)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.31 Å
• R-Value Free: 0.217 
• R-Value Work: 0.198 
• R-Value Observed: 0.199 

Literature

Crystal structure of type III polyketide synthase from Mycobacterium marinum.

Pratap, S., Kant, A., Saxena, P., Krishnan, V.

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: 90.2 kDa 
• Atom Count: 5,403 
• Modelled Residue Count: 726 
• Deposited Residue Count: 826 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chalcone/stilbene synthase	A, B	413	Mycobacterium marinum M	Mutation(s): 0  Gene Names: MMAR_2190
UniProt
Find proteins for B2HNE1 (Mycobacterium marinum (strain ATCC BAA-535 / M)) Explore B2HNE1  Go to UniProtKB:  B2HNE1

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MYR (Subject of Investigation/LOI)	C [auth A], F [auth B]	MYRISTIC ACID C14 H28 O2 TUNFSRHWOTWDNC-UHFFFAOYSA-N
PGE	D [auth A], G [auth B]	TRIETHYLENE GLYCOL C6 H14 O4 ZIBGPFATKBEMQZ-UHFFFAOYSA-N
ACT	E [auth A], H [auth B], I [auth B]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MCS	A, B	L-PEPTIDE LINKING	C6 H9 N O5 S		CYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.31 Å
• R-Value Free: 0.217 
• R-Value Work: 0.198 
• R-Value Observed: 0.199 
• Space Group: H 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 131.407	α = 90
b = 131.407	β = 90
c = 187.187	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data processing
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2022-06-15 
Deposition Author(s): Pratap, S., Kant, A., Saxena, P., Krishnan, V.

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Funding Organization	Location	Grant Number
Department of Science & Technology (DST, India)	India	CRG/2018/002229

Revision History  

• Version 1.0: 2022-06-15
  Type: Initial release
  
• Version 1.1: 2023-11-29
  Changes: Data collection, Derived calculations, Refinement description