1U4C

Structure of spindle checkpoint protein Bub3

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Cell cycle arrest protein BUB3	polymer	349	39695.3	2	UniProt (P26449) Pfam (PF00400) In PDB	Saccharomyces cerevisiae (baker's yeast)
2		water	water		18.0	344	Chemie (HOH)

Sequence modifications

A, B: 1 - 341 (UniProt: P26449)

PDB	External Database	Details
Mse 1	Met 1	MODIFIED RESIDUE
Mse 156	Met 156	MODIFIED RESIDUE
Mse 167	Met 167	MODIFIED RESIDUE
Leu 342	-	EXPRESSION TAG
Glu 343	-	EXPRESSION TAG
His 344	-	EXPRESSION TAG
His 345	-	EXPRESSION TAG
His 346	-	EXPRESSION TAG
His 347	-	EXPRESSION TAG
His 348	-	EXPRESSION TAG
His 349	-	EXPRESSION TAG

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	79390.6
All*	Total formula weight	79390.6

*Water molecules are not included.