2QLA

Crystal Structure of a 16-Helix Bundle Architecture Produced by the Zinc-Mediated Self Assembly of Four Cytochrome cb562 Molecules

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	Soluble cytochrome b562	polymer	106	11726.2	4	UniProt (P0ABE7) Pfam (PF07361) In PDB	Escherichia coli	Cytochrome b-562
2	A, B, C, D	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	4	Chemie (HEM)
3	A, B, C, D	ZINC ION	non-polymer		65.4	4	Chemie (ZN)
4		water	water		18.0	31	Chemie (HOH)

Sequence modifications

A, B, C, D: 1 - 106 (UniProt: P0ABE7)

PDB	External Database	Details
His 59	Lys 81	engineered mutation
His 73	Asp 95	engineered mutation
His 77	Lys 99	engineered mutation
Cys 98	Arg 120	engineered mutation
Cys 101	Tyr 123	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	46904.6
Non-Polymers*	Number of molecules	8
	Total formula weight	2727.6
All*	Total formula weight	49632.2

*Water molecules are not included.