1OK2

Decay accelerating factor (CD55): the structure of an intact human complement regulator.

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)	COMPLEMENT DECAY-ACCELERATING FACTOR	polymer	254	28174.7	2	UniProt (P08174) Pfam (PF00084)	HOMO SAPIENS (HUMAN)	CD55, CR, DAF
2	C, D, K, L (A, B)	ACETATE ION	non-polymer		59.0	4	Chemie (ACT)
3	E, M (A, B)	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
4	F, G, H, I, J... (A, B)	GLYCEROL	non-polymer		92.1	9	Chemie (GOL)
5	R, S (A, B)	water	water		18.0	275	Chemie (HOH)

Sequence modifications

A, B: 1 - 2 (PDB: 1OK2)
A, B: 254 - 254 (PDB: 1OK2)
A, B: 3 - 253 (UniProt: P08174)

PDB	External Database	Details
Ile 48	Thr 80	SEE REMARK 999

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	56349.3
Non-Polymers*	Number of molecules	15
	Total formula weight	1257.1
All*	Total formula weight	57606.5

*Water molecules are not included.