2Y3F

Traptavidin, biotin bound form

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	STREPTAVIDIN	polymer	134	14169.3	1	UniProt (P22629) Pfam (PF01382)	STREPTOMYCES AVIDINII	TRAPTAVIDIN
2	B (A)	BIOTIN	non-polymer		244.3	1	Chemie (BTN)
3	C, D, E (A)	GLYCEROL	non-polymer		92.1	3	Chemie (GOL)
4	F (A)	water	water		18.0	120	Chemie (HOH)

Sequence modifications

A: 13 - 139 (UniProt: P22629)

PDB	External Database	Details
Met 12	-	expression tag
Gly 52	Ser 76	engineered mutation
Asp 53	Arg 77	engineered mutation
His 140	-	expression tag
His 141	-	expression tag
His 142	-	expression tag
His 143	-	expression tag
His 144	-	expression tag
His 145	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	14169.3
Non-Polymers*	Number of molecules	4
	Total formula weight	520.6
All*	Total formula weight	14689.9

*Water molecules are not included.