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 (A, B)	Cell cycle arrest protein BUB3	polymer	349	39695.3	2	UniProt (P26449) Pfam (PF00400)	Saccharomyces cerevisiae (baker's yeast)
2	C, D (A, B)	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.