5XMM

FLA-E*01801-167W/S

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 alpha chain	polymer	275	31848.1	1	UniProt (C6ZK72) Pfam (PF00129) Pfam (PF07654)	Felis catus (Cat)
2	B (B)	Beta-2-microglobulin	polymer	99	11618.1	1	UniProt (Q5MGS7) Pfam (PF07654)	Felis catus (Cat)
3	C (C)	Gag polyprotein	polymer	9	951.0	1	UniProt (P16087)	Feline immunodeficiency virus (FIV)
4	D, E, F (A, B, C)	water	water		18.0	30	Chemie (HOH)

Sequence modifications

A: 2 - 276 (UniProt: C6ZK72)

PDB	External Database	Details
Ser 168	Trp 191	engineered mutation

B: 2 - 99 (UniProt: Q5MGS7)

PDB	External Database	Details
Met 1	-	initiating methionine

C: 1 - 9 (UniProt: P16087)

PDB	External Database	Details
Asp 1	Arg 40	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	44417.2
All*	Total formula weight	44417.2

*Water molecules are not included.