1H9K

Two crystal structures of the cytoplasmic molybdate-binding protein ModG suggest a novel cooperative binding mechanism and provide insights into ligand-binding specificity. Phosphate-grown form with tungstate and phosphate bound

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	MOLYBDENUM-BINDING-PROTEIN	polymer	145	14655.0	1	UniProt (Q44529) Pfam (PF03459)	AZOTOBACTER VINELANDII	MODG
2	B, C (A)	TUNGSTATE(VI)ION	non-polymer		247.8	2	Chemie (WO4)
3	D, E (A)	PHOSPHATE ION	non-polymer		95.0	2	Chemie (PO4)
4	F (A)	water	water		18.0	61	Chemie (HOH)

Sequence modifications

A: -3 - -1 (PDB: 1H9K)
A: 1 - 142 (UniProt: Q44529)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	14655.0
Non-Polymers*	Number of molecules	4
	Total formula weight	685.6
All*	Total formula weight	15340.6

*Water molecules are not included.