1SWS

CORE-STREPTAVIDIN MUTANT D128A AT PH 4.5

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)	PROTEIN (STREPTAVIDIN)	polymer	127	13237.3	4	UniProt (SAV_STRAV) Pfam (PF01382) UniProt (by SIFTS) (P22629)	Streptomyces avidinii
2	E, F, G, H (A, B, C, D)	water	water		18.0	178	Chemie (HOH)

Sequence modifications

A, B, C, D: 13 - 139 (UniProt: null)

PDB	External Database	Details
Ala 128	Asp 152	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	52949.3
All*	Total formula weight	52949.3

*Water molecules are not included.