7SU0

Crystal structure of an acidic pH-selective Ipilimumab variant Ipi.105 in complex with CTLA-4

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, D (C, D)	Cytotoxic T-lymphocyte protein 4	polymer	125	13555.4	2	UniProt (P16410) Pfam (PF07686)	Homo sapiens (Human)	Cytotoxic T-lymphocyte-associated antigen 4,CTLA-4
2	B, E (H, I)	Fab heavy chain	polymer	229	24749.7	2		Homo sapiens (Human)
3	C, F (L, M)	Fab light chain	polymer	215	23527.0	2		Homo sapiens (Human)
4	G, H, I (C, D)	2-acetamido-2-deoxy-beta-D-glucopyranose	non-polymer		221.2	3	Chemie (NAG)
5	J (I)	CITRATE ANION	non-polymer		189.1	1	Chemie (FLC)
6	K (M)	DI(HYDROXYETHYL)ETHER	non-polymer		106.1	1	Chemie (PEG)
7	L, M, N, O, P (C, H, L, I, M)	water	water		18.0	36	Chemie (HOH)

Sequence modifications

C, D: 1 - 118 (UniProt: P16410)

PDB	External Database	Details
Gly 119	-	expression tag
His 120	-	expression tag
His 121	-	expression tag
His 122	-	expression tag
His 123	-	expression tag
His 124	-	expression tag
His 125	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	123664.3
Non-Polymers*	Number of molecules	5
	Total formula weight	958.8
All*	Total formula weight	124623.1

*Water molecules are not included.