6H74 | pdb_00006h74

The molybdenum storage protein - L131H

• PDB DOI: https://doi.org/10.2210/pdb6H74/pdb

• Classification: METAL BINDING PROTEIN
• Organism(s): Azotobacter vinelandii
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2018-07-30 Released: 2018-11-14 
• Deposition Author(s): Ermler, U., Bruenle, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.200 (Depositor), 0.201 (DCC) 
• R-Value Work: 
  0.178 (Depositor), 0.179 (DCC) 
• R-Value Observed: 
  0.179 (Depositor) 

Starting Model: experimental

Literature

The molybdenum storage protein - A bionanolab for creating experimentally alterable polyoxomolybdate clusters.

Brunle, S., Poppe, J., Hail, R., Demmer, U., Ermler, U.

(2018) J Inorg Biochem 189: 172-179

• PubMed: 30278367 
• DOI: https://doi.org/10.1016/j.jinorgbio.2018.09.011
• Primary Citation of Related Structures:  
  6GWB, 6H6W, 6H73, 6H74, 6H8B, 6H8H

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Organizational Affiliation: 
• Max-Planck-Institut für Biophysik, Max-von-Laue-Str. 3, D-60438 Frankfurt/Main, Germany.
Max-Planck-Institut für Biophysik, Max-von-Laue-Str. 3, D-60438 Frankfurt/Main, Germany; Biochemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstraße 25, D-33615 Bielefeld, Germany.
Max-Planck-Institut für Biophysik, Max-von-Laue-Str. 3, D-60438 Frankfurt/Main, Germany. Electronic address: [e-mail].

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Hetero 6-mer - A3B3 Pseudo Symmetry: Dihedral - D3  (Explore in 3D)
Pseudo Stoichiometry: Homo 6-mer - A6 

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

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 62.12 kDa 
• Atom Count: 4,381 
• Modeled Residue Count: 512 
• Deposited Residue Count: 544 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Molybdenum storage protein subunit beta	A [auth B]	269	Azotobacter vinelandii	Mutation(s): 1  Gene Names: mosB, Avin_43210
UniProt
Find proteins for P84253 (Azotobacter vinelandii (strain DJ / ATCC BAA-1303)) Explore P84253  Go to UniProtKB:  P84253

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Molybdenum storage protein subunit alpha	B [auth A]	275	Azotobacter vinelandii	Mutation(s): 0  Gene Names: mosA, Avin_43200
UniProt
Find proteins for P84308 (Azotobacter vinelandii (strain DJ / ATCC BAA-1303)) Explore P84308  Go to UniProtKB:  P84308

Small Molecules

Ligands 7 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GWN	K [auth A]	Mo8 cluster H15 Mo8 O28 IZBWZCCEFXYSQI-UHFFFAOYSA-A
FUQ	D [auth B], H [auth A]	Mo5 Cluster H20 Mo5 O25 KKTGFJKWMBVMER-UHFFFAOYSA-A
ATP	C [auth B], I [auth A]	ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 ZKHQWZAMYRWXGA-KQYNXXCUSA-N
GWW	E [auth B]	pentakis(oxidanyl)molybdenum H5 Mo O5 YKIBNQKYGDOJJG-UHFFFAOYSA-I
MOO	L [auth A]	MOLYBDATE ION Mo O4 MEFBJEMVZONFCJ-UHFFFAOYSA-N
PO4	F [auth B], G [auth B]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
MG	J [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.200 (Depositor), 0.201 (DCC) 
• R-Value Work:  0.178 (Depositor), 0.179 (DCC) 
• R-Value Observed: 0.179 (Depositor) 

Space Group: P 6₃ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 114.27	α = 90
b = 114.27	β = 90
c = 234.14	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2018-11-14 
Deposition Author(s): Ermler, U., Bruenle, S.

Revision History  

• Version 1.0: 2018-11-14
  Type: Initial release
  
• Version 1.1: 2024-01-17
  Changes: Advisory, Data collection, Database references, Refinement description
• Version 1.2: 2025-10-01
  Changes: Advisory, Derived calculations, Structure summary