6F4G

'Crystal structure of the Drosophila melanogaster SNF/U2A'/U2-SL4 complex

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, D	Probable U2 small nuclear ribonucleoprotein A'	polymer	176	20473.6	2	UniProt (Q9V4Q8) Pfam (PF14580) In PDB	Drosophila melanogaster (Fruit fly)	U2 snRNP A'
2	B, E	U1 small nuclear ribonucleoprotein A	polymer	98	11082.0	2	UniProt (P43332) Pfam (PF00076) In PDB	Drosophila melanogaster (Fruit fly)	U1A,Sex determination protein snf
3	C, F	U2-SL4	polymer	25	8020.8	2		Drosophila melanogaster
4	B, E	CHLORIDE ION	non-polymer		35.5	2	Chemie (CL)
5	D	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
6		water	water		18.0	875	Chemie (HOH)

Sequence modifications

A, D: 1 - 176 (UniProt: Q9V4Q8)

PDB	External Database	Details
Val 19	Cys 19	engineered mutation
Thr 68	Cys 68	engineered mutation
Ser 119	Cys 119	engineered mutation

B, E: 1 - 96 (UniProt: P43332)

PDB	External Database	Details
Gly -1	-	expression tag
Ala 0	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	79152.9
Non-Polymers*	Number of molecules	4
	Total formula weight	263.0
All*	Total formula weight	79415.9

*Water molecules are not included.