4OZI

S2 protein complex

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C (A, C)	HLA class II histocompatibility antigen, DQ alpha 1 chain	polymer	191	21517.9	2	UniProt (P01909) Pfam (PF00993) Pfam (PF07654)	Homo sapiens (Human)	DC-1 alpha chain,DC-alpha,HLA-DCA,MHC class II DQA1
2	B, D (B, D)	HLA class II histocompatibility antigen, DQ beta 1 chain	polymer	213	24361.2	2	UniProt (Q5Y7D3) Pfam (PF00969) Pfam (PF07654) UniProt (by SIFTS) (P01920)	Homo sapiens (Human)	MHC class II antigen
3	E, G (E, G)	T-cell receptor, s2, alpha chain	polymer	207	22915.3	2	Pfam (PF07686) Pfam (PF09291) UniProt (by SIFTS) (Q2YD82)	Homo sapiens (Human)
4	F, H (F, H)	T-cell receptor, s2, beta chain	polymer	244	27447.8	2	Pfam (PF07654) UniProt (by SIFTS) (P01850)	Homo sapiens (Human)
5	I, J (I, J)	deamidated Gliadin-alpha1 peptide	polymer	13	1456.6	2	UniProt (by SIFTS) (P04722)	Triticum aestivum (bread wheat)
6	K, M (A, C)	2-acetamido-2-deoxy-beta-D-glucopyranose	non-polymer		221.2	2	Chemie (NAG)
7	L, N (B, D)	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)

Sequence modifications

B, D: 1 - 192 (UniProt: Q5Y7D3)

PDB	External Database	Details
Gly -12	-	expression tag
Gly -11	-	expression tag
Ser -10	-	expression tag
Ile -9	-	expression tag
Glu -8	-	expression tag
Gly -7	-	expression tag
Arg -6	-	expression tag
Gly -5	-	expression tag
Gly -4	-	expression tag
Ser -3	-	expression tag
Gly -2	-	expression tag
Ala -1	-	expression tag
Ser 0	-	expression tag
Thr 193	-	expression tag
Gly 194	-	expression tag
Gly 195	-	expression tag
Asp 196	-	expression tag
Asp 197	-	expression tag
Asp 198	-	expression tag
Asp 199	-	expression tag
Lys 200	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	10
	Total formula weight	195397.5
Non-Polymers*	Number of molecules	4
	Total formula weight	522.6
All*	Total formula weight	195920.1

*Water molecules are not included.