4N4C

Crystal structure of the C-terminal swapped dimer of a Bovine seminal ribonuclease mutant

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Seminal ribonuclease	polymer	124	13721.7	2	UniProt (P00669) Pfam (PF00074) In PDB	Bos taurus (bovine cow domestic cattle domestic cow)	S-RNase, Seminal RNase, Ribonuclease BS-1
2	A	PHOSPHATE ION	non-polymer		95.0	2	Chemie (PO4)
3		water	water		18.0	35	Chemie (HOH)

Sequence modifications

A, B: 1 - 124 (UniProt: P00669)

PDB	External Database	Details
Ser 16	Gly 42	engineered mutation
Thr 17	Asn 43	engineered mutation
Ala 19	Pro 45	engineered mutation
Ala 20	Ser 46	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	27443.5
Non-Polymers*	Number of molecules	2
	Total formula weight	189.9
All*	Total formula weight	27633.4

*Water molecules are not included.