CATH Domain 1r5iD01

Level	CATH Code	Description
	1	Mainly Alpha
	1.20	Up-down Bundle
	1.20.120	Four Helix Bundle (Hemerythrin (Met), subunit A)
	1.20.120.390	Hla class ii histocompatibility antigen, dr alpha chain. Chain D, domain 1

Superfamily	Hla class ii histocompatibility antigen, dr alpha chain. Chain D, domain 1
Functional Family

P11133	HEMA_I78A9 Influenza A virus (A/swine/Hong Kong/81/1978(H3N2)) Hemagglutinin
P01903	DRA_HUMAN Homo sapiens HLA class II histocompatibility antigen, DR alpha chain
Q48898	Q48898_MYCAT Mycoplasma arthritidis Superantigen

PDB	1R5I
External Links	PDBSum Proteopedia
Method	X-RAY DIFFRACTION
Organism	Escherichia
Primary Citation	Crystal structure of Mycoplasma arthritidis mitogen complexed with HLA-DR1 reveals a novel superantigen fold and a dimerized superantigen-MHC complex. Zhao, Y., Li, Z., Drozd, S.J., Guo, Y., Mourad, W., Li, H. Structure