2GAO

Crystal Structure of Human SAR1a in Complex With GDP

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	GTP-binding protein SAR1a	polymer	208	23208.6	2	UniProt (Q9NR31) Pfam (PF00025)	Homo sapiens (human)	COPII-associated small GTPase
2	C, E (A, B)	GUANOSINE-5'-DIPHOSPHATE	non-polymer		443.2	2	Chemie (GDP)
3	D, F (A, B)	UNKNOWN ATOM OR ION	non-polymer			2	Chemie (UNX)
4	G, H (A, B)	water	water		18.0	61	Chemie (HOH)

Sequence modifications

A, B: 10 - 198 (UniProt: Q9NR31)

PDB	External Database	Details
Met -9	-	cloning artifact
Gly -8	-	cloning artifact
Ser -7	-	cloning artifact
Ser -6	-	cloning artifact
His -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
His -1	-	expression tag
His 0	-	expression tag
Ser 1	-	cloning artifact
Ser 2	-	cloning artifact
Gly 3	-	cloning artifact
Leu 4	-	cloning artifact
Val 5	-	cloning artifact
Pro 6	-	cloning artifact
Arg 7	-	cloning artifact
Gly 8	-	cloning artifact
Ser 9	-	cloning artifact

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	46417.1
Non-Polymers*	Number of molecules	4
	Total formula weight	886.4
All*	Total formula weight	47303.5

*Water molecules are not included.