1L9A

CRYSTAL STRUCTURE OF SRP19 IN COMPLEX WITH THE S DOMAIN OF SIGNAL RECOGNITION PARTICLE RNA

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	B	signal recognition particle RNA S domain	polymer	128	41566.7	1	GenBank (23932)		SRP RNA, 7S RNA, 7SL RNA
2	A	SIGNAL RECOGNITION PARTICLE 19 KDA PROTEIN	polymer	87	10341.3	1	UniProt (Q58440) Pfam (PF01922) In PDB	Methanocaldococcus jannaschii	SRP19
3	B, A	MAGNESIUM ION	non-polymer		24.3	24	Chemie (MG)
4	A	METHYL MERCURY ION	non-polymer		215.6	1	Chemie (MMC)
5		water	water		18.0	30	Chemie (HOH)

Sequence modifications

A: 1 - 87 (UniProt: Q58440)

PDB	External Database	Details
Ala 61	Cys 61	engineered mutation
Arg 63	Cys 63	engineered mutation
Cys 74	Gln 74	engineered mutation
Ala 80	Cys 80	engineered mutation

B: 112 - 239 (GenBank: 23932)

PDB	External Database	Details
G 112	C 112	engineered mutation
A 113	G 113	engineered mutation
U 238	G 238	engineered mutation
Ccc 239	G 239	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	51908.1
Non-Polymers*	Number of molecules	25
	Total formula weight	798.9
All*	Total formula weight	52707.0

*Water molecules are not included.