5CSI

S100B-RSK1 crystal structure A'

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Protein S100-B	polymer	95	11009.3	2	UniProt (P04271) Pfam (PF01023) Pfam (PF00036) In PDB	Homo sapiens (Human)	S-100 protein beta chain,S-100 protein subunit beta,S100 calcium-binding protein B
2	C	Ribosomal protein S6 kinase alpha-1	polymer	49	5260.1	1	UniProt (Q15418) In PDB	Homo sapiens (Human)	S6K-alpha-1,90 kDa ribosomal protein S6 kinase 1,p90S6K,MAP kinase-activated protein kinase 1a,MAPKAPK-1a,Ribosomal S6 kinase 1,RSK-1
3	A, B	CALCIUM ION	non-polymer		40.1	4	Chemie (CA)
4		water	water		18.0	40	Chemie (HOH)

Sequence modifications

A, B: 0 - 91 (UniProt: P04271)

PDB	External Database	Details
Gly -3	-	expression tag
Ser -2	-	expression tag
His -1	-	expression tag

C: 689 - 735 (UniProt: Q15418)

PDB	External Database	Details
Gly 687	-	expression tag
Ser 688	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	27278.7
Non-Polymers*	Number of molecules	4
	Total formula weight	160.3
All*	Total formula weight	27439.0

*Water molecules are not included.