7LHX

Human U1A protein with F37M and F77M mutations for improved phasing

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	U1 small nuclear ribonucleoprotein A	polymer	98	11636.6	1	UniProt (P09012) Pfam (PF00076) In PDB	Homo sapiens (Human)	U1A
2	A	SODIUM ION	non-polymer		23.0	1	Chemie (NA)
3	A	ACETATE ION	non-polymer		59.0	2	Chemie (ACT)
4	A	BETA-MERCAPTOETHANOL	non-polymer		78.1	1	Chemie (BME)
5		water	water		18.0	85	Chemie (HOH)

Sequence modifications

A: 1 - 98 (UniProt: P09012)

PDB	External Database	Details
His 31	Tyr 31	engineered mutation
Arg 36	Gln 36	engineered mutation
Mse 37	Phe 37	engineered mutation
Mse 77	Phe 77	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	11636.6
Non-Polymers*	Number of molecules	4
	Total formula weight	219.2
All*	Total formula weight	11855.8

*Water molecules are not included.