4C3T

The Carbonic anhydrase from Thermovibrio ammonificans reveals an interesting intermolecular disulfide contributing to increasing thermal stability of this enzyme

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	CARBONATE DEHYDRATASE	polymer	247	27725.9	2	UniProt (E8T502) Pfam (PF00194)	THERMOVIBRIO AMMONIFICANS	ALPHA CARBONIC ANHYDRASE
2	C, E (A, B)	ZINC ION	non-polymer		65.4	2	Chemie (ZN)
3	D, F (A, B)	CHLORIDE ION	non-polymer		35.5	2	Chemie (CL)
4	G, H (A, B)	water	water		18.0	291	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	55451.8
Non-Polymers*	Number of molecules	4
	Total formula weight	201.7
All*	Total formula weight	55653.5

*Water molecules are not included.