4XT1

Structure of a nanobody-bound viral GPCR bound to human chemokine CX3CL1

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	G-protein coupled receptor homolog US28	polymer	362	42041.1	1	UniProt (P69332) Pfam (PF00001) In PDB	Cytomegalovirus	HHRF3
2	B	Fractalkine	polymer	91	9970.5	1	UniProt (P78423) Pfam (PF00048) In PDB	Homo sapiens (Human)	C-X3-C motif chemokine 1,CX3C membrane-anchored chemokine,Neurotactin,Small-inducible cytokine D1
3	C	nanobody 7	polymer	134	14624.2	1		Vicugna pacos
4	A	CHOLESTEROL	non-polymer		386.7	2	Chemie (CLR)
5	A	(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate	non-polymer		356.5	6	Chemie (OLC)
6	A	UNKNOWN LIGAND	non-polymer			7	Chemie (UNL)
7	A	SUCCINIC ACID	non-polymer		118.1	1	Chemie (SIN)
8		water	water		18.0	23	Chemie (HOH)

Sequence modifications

A: 1 - 354 (UniProt: P69332)

PDB	External Database	Details
Asp -7	-	expression tag
Tyr -6	-	expression tag
Lys -5	-	expression tag
Asp -4	-	expression tag
Asp -3	-	expression tag
Asp -2	-	expression tag
Asp -1	-	expression tag
Ala 0	-	expression tag

B: 1 - 77 (UniProt: P78423)

PDB	External Database	Details
Ala 9	Asn 33	engineered mutation
Ser 78	-	expression tag
Gly 79	-	expression tag
Ser 80	-	expression tag
Gly 81	-	expression tag
Ser 82	-	expression tag
Ala 83	-	expression tag
Ala 84	-	expression tag
Ala 85	-	expression tag
Leu 86	-	expression tag
Glu 87	-	expression tag
Val 88	-	expression tag
Leu 89	-	expression tag
Phe 90	-	expression tag
Gln 91	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	66635.7
Non-Polymers*	Number of molecules	16
	Total formula weight	3030.6
All*	Total formula weight	69666.4

*Water molecules are not included.