7ZQJ

MHC class I from a wild bird in complex with a nonameric peptide P3

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	MHC class I antigen	polymer	275	31630.1	1	UniProt (O98187) Pfam (PF00129) Pfam (PF07654)	Acrocephalus arundinaceus (great reed warbler)
2	B (B)	Beta-2-microglobulin	polymer	122	14206.0	1	UniProt (A0A076JEK1) Pfam (PF07654)	Acrocephalus arundinaceus (great reed warbler)
3	C (F)	Uncharacterized protein Rv3403c	polymer	9	1038.3	1	UniProt (P9WKZ5)	Mycobacterium sp.
4	D (A)	ACETATE ION	non-polymer		59.0	1	Chemie (ACT)
5	E (A)	SULFATE ION	non-polymer		96.1	1	Chemie (SO4)
6	F, G (A, B)	water	water		18.0	76	Chemie (HOH)

Sequence modifications

A: 3 - 276 (UniProt: O98187)

PDB	External Database	Details
Met 2	-	initiating methionine

B: 6 - 104 (UniProt: A0A076JEK1)

PDB	External Database	Details
Met -17	-	initiating methionine
His -16	-	expression tag
His -15	-	expression tag
His -14	-	expression tag
His -13	-	expression tag
His -12	-	expression tag
His -11	-	expression tag
Ser -10	-	expression tag
Ser -9	-	expression tag
Gly -8	-	expression tag
Val -7	-	expression tag
Asp -6	-	expression tag
Leu -5	-	expression tag
Gly -4	-	expression tag
Thr -3	-	expression tag
Glu -2	-	expression tag
Asn -1	-	expression tag
Leu 0	-	expression tag
Tyr 1	-	expression tag
Phe 2	-	expression tag
Gln 3	-	expression tag
Ser 4	-	expression tag
Met 5	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	46874.3
Non-Polymers*	Number of molecules	2
	Total formula weight	155.1
All*	Total formula weight	47029.5

*Water molecules are not included.