4X6F

CD1a binary complex with sphingomyelin

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	T-cell surface glycoprotein CD1a	polymer	281	32178.2	1	UniProt (P06126) Pfam (PF16497) Pfam (PF07654)	Homo sapiens (Human)	T-cell surface antigen T6/Leu-6,hTa1 thymocyte antigen
2	B (B)	Beta-2-microglobulin	polymer	105	12358.9	1	UniProt (P61769) Pfam (PF07654)	Homo sapiens (Human)
3	C (A)	(4S,7S,23Z)-4-hydroxy-7-[(1S,2Z)-1-hydroxyhexadec-2-en-1-yl]-N,N,N-trimethyl-9-oxo-3,5-dioxa-8-aza-4-phosphadotriacont- 23-en-1-aminium 4-oxide	non-polymer		814.2	1	Chemie (3XU)
4	D, E (A, B)	water	water		18.0	174	Chemie (HOH)

Sequence modifications

A: 4 - 278 (UniProt: P06126)

PDB	External Database	Details
Ile 13	Thr 30	variant
Trp 51	Cys 68	variant
Gly 279	-	expression tag
Ser 280	-	expression tag
Leu 281	-	expression tag
Val 282	-	expression tag
Pro 283	-	expression tag
Arg 284	-	expression tag

B: 1 - 99 (UniProt: P61769)

PDB	External Database	Details
Gly 100	-	expression tag
Ser 101	-	expression tag
Leu 102	-	expression tag
Val 103	-	expression tag
Pro 104	-	expression tag
Arg 105	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	44537.1
Non-Polymers*	Number of molecules	1
	Total formula weight	814.2
All*	Total formula weight	45351.3

*Water molecules are not included.