5ZIQ

Crystal structure of hexacoordinated heme protein from anhydrobiotic tardigrade at pH 4

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D (A, B, C, D)	Globin protein	polymer	171	20269.0	4	UniProt (A0A1D1V896) Pfam (PF00042)	Ramazzottius varieornatus (Water bear)
2	E, J, O, R (A, B, C, D)	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	4	Chemie (HEM)
3	F, G, H, K, L... (A, B, C)	SULFATE ION	non-polymer		96.1	7	Chemie (SO4)
4	I, N, Q (A, B, C)	1,2-ETHANEDIOL	non-polymer		62.1	3	Chemie (EDO)
5	S, T, U, V (A, B, C, D)	water	water		18.0	644	Chemie (HOH)

Sequence modifications

A, B, C, D: 37 - 190 (UniProt: A0A1D1V896)

PDB	External Database	Details
Met 20	-	expression tag
Gly 21	-	expression tag
Ser 22	-	expression tag
Ser 23	-	expression tag
His 24	-	expression tag
His 25	-	expression tag
His 26	-	expression tag
His 27	-	expression tag
His 28	-	expression tag
His 29	-	expression tag
Glu 30	-	expression tag
Asn 31	-	expression tag
Leu 32	-	expression tag
Tyr 33	-	expression tag
Phe 34	-	expression tag
Gln 35	-	expression tag
Ser 36	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	81075.8
Non-Polymers*	Number of molecules	14
	Total formula weight	3324.6
All*	Total formula weight	84400.4

*Water molecules are not included.