4P3F

Structure of the human SRP68-RBD

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Signal recognition particle subunit SRP68	polymer	216	25604.2	2	UniProt (Q9UHB9) Pfam (PF16969) In PDB	Homo sapiens (Human)	SRP68, Signal recognition particle 68 kDa protein
2	A	DI(HYDROXYETHYL)ETHER	non-polymer		106.1	3	Chemie (PEG)
3	A	1,2-ETHANEDIOL	non-polymer		62.1	4	Chemie (EDO)
4		water	water		18.0	367	Chemie (HOH)

Sequence modifications

A, B: 39 - 246 (UniProt: Q9UHB9)

PDB	External Database	Details
Met 31	-	initiating methionine
Gly 32	-	expression tag
His 33	-	expression tag
His 34	-	expression tag
His 35	-	expression tag
His 36	-	expression tag
His 37	-	expression tag
His 38	-	expression tag
Asp 108	Glu 116	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	51208.5
Non-Polymers*	Number of molecules	7
	Total formula weight	566.6
All*	Total formula weight	51775.1

*Water molecules are not included.