1A9N

CRYSTAL STRUCTURE OF THE SPLICEOSOMAL U2B''-U2A' PROTEIN COMPLEX BOUND TO A FRAGMENT OF U2 SMALL NUCLEAR RNA

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (Q, R)	RNA (5'-R(*CP*CP*UP*GP*GP*UP*AP*UP*UP*GP*CP*AP*GP*UP*AP*CP*CP*UP*CP*CP*AP*GP* GP*U)-3')	polymer	24	7622.5	2		Homo sapiens (human)
2	C, D (A, C)	U2A'	polymer	176	20226.6	2	UniProt (P09661) Pfam (PF14580)	Homo sapiens (human)	U2A'
3	E, F (B, D)	SPLICEOSOMAL U2B''	polymer	96	11149.1	2	UniProt (P08579) Pfam (PF00076)	Homo sapiens (human)	SPLICEOSOMAL U2B''

Sequence modifications

A, C: 1 - 176 (UniProt: P09661)

PDB	External Database	Details
Asp 89	Cys 89	engineered mutation
Cys 119	Ser 119	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	77996.4
All*	Total formula weight	77996.4

*Water molecules are not included.