Note - Blast analyses are based on comparisons of the phosphosites and the bordering four amino acids on each side of these phosphosites.

Phosphosite
Human Protein:	USP18
Human P-Site:	S20
P-Site Sequence:	QSILAESSQSPADLE
UniProt:	Q9UMW8
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	USP18	Q9UMW8	S20	QSILAESSQSPADLE	100 / 9 AA	43
Phosphosite 1:	USP18	Q9UMW8	S22	ILAESSQSPADLEEK	100 / 7 AA	43
Phosphosite 2:	MAGE-C1	O60732	S648	PQSFPESSQSPPEGP	66 / 9 AA	124
Phosphosite 3:	ARID5A	Q03989	S297	PAVHLPESPQSPKGL	75 / 8 AA	64
Phosphosite 4:	MTA1	Q13330	S520	TARLPEASQSPLVLK	75 / 8 AA	81
Phosphosite 5:	BRCA1	P38398	S1610	PQLKVAESAQSPAAA	75 / 8 AA	208
Phosphosite 6:	MAGE-C1	O60732	S647	LPQSFPESSQSPPEG	75 / 8 AA	124
Phosphosite 7:	BIRC6	Q9NR09	S3589	LATLASSSQSPEAIK	87 / 8 AA	528
Phosphosite 8:	CACNA1E	Q15878	S2211	NACLTESSNSPHPQQ	75 / 8 AA	262
Phosphosite 9:	FARP1	Q9Y4F1	S861	AIDLAEKSSSPAPEF	77 / 9 AA	119
Phosphosite 10:	BRCA1	P38398	S1613	KVAESAQSPAAAHTT	85 / 7 AA	208
Phosphosite 11:	FOXM1	Q08050	S506	SHSWEDSSQSPTPRP	55 / 9 AA	84
Phosphosite 12:	BAG3	O95817	S171	ASHGPERSQSPAASD	75 / 8 AA	62
Phosphosite 13:	BAHCC1	Q9P281	S1446	ERDESSRSPARRGPG	85 / 7 AA	277
Phosphosite 14:	BAG3	O95817	S173	HGPERSQSPAASDCS	85 / 7 AA	62
Phosphosite 15:	LOC136288	Q8NEG2	S278	GPEDTPESSQSPEES	85 / 7 AA	33
Phosphosite 16:	LOC136288	Q8NEG2	S279	PEDTPESSQSPEESV	85 / 7 AA	33
Phosphosite 17:	KCTD17	Q8N5Z5	S248	AQEKAQSSQDPANLF	75 / 8 AA	36
Phosphosite 18:	MAGE-C1	O60732	S650	SFPESSQSPPEGPVQ	85 / 7 AA	124
Phosphosite 19:	SERAC1	Q96JX3	S238	TSLALSESSQSLAAQ	85 / 7 AA	74
Phosphosite 20:	HERV-H_22q11.2 provirus ancestral Gag polyprotein	Q8N8A4	S127	TPSVAESSQSSFSTD	75 / 8 AA	30