4NPF

High-resolution structure of two tandem B domains of staphylococcal protein A connected by the conserved linker

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (Y, X)	Immunoglobulin G-binding protein A	polymer	116	13272.5	2	UniProt (P38507) Pfam (PF02216)	Staphylococcus aureus	IgG-binding protein A, Staphylococcal protein A
2	C, D (Y, X)	water	water		18.0	405	Chemie (HOH)

Sequence modifications

Y, X: 1 - 158 (UniProt: P38507)

PDB	External Database	Details
Lys 4	Asn 157	SEE REMARK 999
Trp 13	Phe 166	engineered mutation
His 18	Asn 171	SEE REMARK 999
Leu 19	Met 172	SEE REMARK 999
Asp 53	Glu 206	SEE REMARK 999
Ala 54	Ser 207	SEE REMARK 999
Trp 113	Phe 224	SEE REMARK 999

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	26545.1
All*	Total formula weight	26545.1

*Water molecules are not included.