1KTD

CRYSTAL STRUCTURE OF CLASS II MHC MOLECULE IEK BOUND TO PIGEON CYTOCHROME C PEPTIDE

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C	H-2 class II histocompatibility antigen, E-D alpha chain	polymer	182	21167.7	2	UniProt (P01904) Pfam (PF00993) Pfam (PF07654) In PDB	Mus musculus (Mouse)	H2-IE-alpha
2	B, D	Fusion protein consisting of cytochrome C peptide, glycine rich linker, and MHC E-beta-k	polymer	215	24387.2	2	UniProt (P00021) UniProt (Q31163) Pfam (PF00969) Pfam (PF07654) UniProt (by SIFTS) (P04230) In PDB	Columba livia (Rock dove)
3	A, B, C	2-acetamido-2-deoxy-beta-D-glucopyranose	non-polymer		221.2	4	Chemie (NAG)
4	B	SULFATE ION	non-polymer		96.1	1	Chemie (SO4)
5		water	water		18.0	317	Chemie (HOH)

Sequence modifications

B, D: 1 - 14 (UniProt: P00021)

PDB	External Database	Details
Ala 1	Arg 92	conflict
Ser 12	Thr 103	engineered mutation
Gly 15	-	linker
Gly 16	-	linker
Gly 17	-	linker
Gly 18	-	linker
Ser 19	-	linker
Leu 20	-	linker
Val 21	-	linker
Gly 22	-	linker
Gly 23	-	linker
Gly 24	-	linker
Ser 25	-	linker
Gly 26	-	linker
Gly 27	-	linker
Gly 28	-	linker
Gly 29	-	linker

B, D: 30 - 215 (UniProt: Q31163)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	91109.7
Non-Polymers*	Number of molecules	5
	Total formula weight	980.9
All*	Total formula weight	92090.6

*Water molecules are not included.