4GDA

Circular Permuted Streptavidin A50/N49

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)	Streptavidin	polymer	131	13539.6	2	UniProt (P22629)	Streptomyces avidinii
2	C, G (A, B)	BIOTIN	non-polymer		244.3	2	Chemie (BTN)
3	D, E, H (A, B)	GLYCEROL	non-polymer		92.1	3	Chemie (GOL)
4	F, I, J (A, B)	SULFATE ION	non-polymer		96.1	3	Chemie (SO4)
5	K (B)	ETHANOL	non-polymer		46.1	1	Chemie (EOH)
6	L, M (A, B)	water	water		18.0	331	Chemie (HOH)

Sequence modifications

A, B: 50 - 208 (UniProt: P22629)
A, B: 213 - 249 (UniProt: P22629)

PDB	External Database	Details
Gly 209	-	linker
Gly 210	-	linker
Gly 211	-	linker
Ser 212	-	linker

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	27079.1
Non-Polymers*	Number of molecules	9
	Total formula weight	1099.2
All*	Total formula weight	28178.3

*Water molecules are not included.