1JID

Human SRP19 in complex with helix 6 of Human SRP 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)	HELIX 6 OF HUMAN SRP RNA	polymer	29	9628.4	1	GenBank (36086)
2	B (A)	SIGNAL RECOGNITION PARTICLE 19 KDA PROTEIN	polymer	128	14791.1	1	UniProt (P09132) Pfam (PF01922)	Homo sapiens (human)
3	C, D (B)	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
4	E, F (B, A)	water	water		18.0	277	Chemie (HOH)

Sequence modifications

A: 1 - 120 (UniProt: P09132)

PDB	External Database	Details
Leu 121	-	expression tag
Glu 122	-	expression tag
His 123	-	expression tag
His 124	-	expression tag
His 125	-	expression tag
His 126	-	expression tag
His 127	-	expression tag
His 128	-	expression tag

B: 135 - 163 (GenBank: 36086)

PDB	External Database	Details
U 162	C 166	engineered mutation
A23 163	A 167	modified residue

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	24419.5
Non-Polymers*	Number of molecules	2
	Total formula weight	48.6
All*	Total formula weight	24468.1

*Water molecules are not included.