2XN9

Crystal structure of the ternary complex between human T cell receptor, staphylococcal enterotoxin H and human major histocompatibility complex class II

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	T CELL RECEPTOR ALPHA CHAIN C REGION	polymer	204	22313.8	1	UniProt (P01848) Pfam (PF09291) In PDB	HOMO SAPIENS (HUMAN)
2	B	T CELL RECEPTOR BETA-1 CHAIN C REGION	polymer	244	27785.8	1	UniProt (P01850) Pfam (PF07654) In PDB	HOMO SAPIENS (HUMAN)
3	C	ENTEROTOXIN H	polymer	217	25180.2	1	UniProt (P0A0M0) Pfam (PF01123) Pfam (PF02876) In PDB	STAPHYLOCOCCUS AUREUS	SEH, STAPHYLOCOCCAL ENTEROTOXIN H
4	D	HLA CLASS II HISTOCOMPATIBILITY ANTIGEN, DR ALPHA CHAIN,	polymer	182	21155.9	1	UniProt (P01903) Pfam (PF00993) Pfam (PF07654) In PDB	HOMO SAPIENS (HUMAN)	MAJOR HISTOCOMPATIBILITY COMPLEX CLASS II ALPHA, MHC CLASS II ANTIGEN DRA CHAIN
5	E	MAJOR HISTOCOMPATIBILITY COMPLEX CLASS II BETA CHAIN	polymer	190	22080.7	1	UniProt (P04229) Pfam (PF00969) Pfam (PF07654) UniProt (by SIFTS) (P01911) In PDB	HOMO SAPIENS (HUMAN)	MHC CLASS II ANTIGEN DRB1.1, DR-1, DR1
6	F	HEMAGGLUTININ	polymer	13	1506.8	1	UniProt (A8CDU0) UniProt (by SIFTS) (Q03909) In PDB	INFLUENZA A VIRUS	INFLUENZA HEMAGGLUTININ PEPTIDE
7	A, B	GLYCEROL	non-polymer		92.1	4	Chemie (GOL)
8	C	SODIUM ION	non-polymer		23.0	1	Chemie (NA)
9		water	water		18.0	280	Chemie (HOH)

Sequence modifications

A: 1 - 109 (PDB: 2XN9)
A: 110 - 204 (UniProt: P01848)

PDB	External Database	Details
Cys 158	Thr 49	engineered mutation

B: 1 - 114 (PDB: 2XN9)
B: 115 - 244 (UniProt: P01850)

PDB	External Database	Details
Lys 118	Asn 4	conflict
Asn 119	Lys 5	conflict
Tyr 151	Phe 37	conflict
Cys 171	Ser 57	engineered mutation
Ser 189	Cys 75	conflict

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	120023.2
Non-Polymers*	Number of molecules	5
	Total formula weight	391.4
All*	Total formula weight	120414.6

*Water molecules are not included.