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:	USP4
Human P-Site:	S690
P-Site Sequence:	DEPGNDPSETTQKKI
UniProt:	Q13107
Intern. Prot. ID:	IPI00011836

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	USP4	Q13107	S690	DEPGNDPSETTQKKI	100 / 9 AA	109
Phosphosite 1:	ARHGEF18	Q6ZSZ5	S675	LFRGGDPSETLQGEL	77 / 9 AA	131
Phosphosite 2:	ARHGEF18	Q6ZSZ5	T677	RGGDPSETLQGELIL	85 / 7 AA	131
Phosphosite 3:	POU2F3	Q9UKI9	S225	KLYGNDFSQTTISRF	75 / 8 AA	47
Phosphosite 4:	POU2F1	P14859	S322	KLYGNDFSQTTISRF	75 / 8 AA	76
Phosphosite 5:	POU2F2	P09086	S237	KLYGNDFSQTTISRF	75 / 8 AA	51
Phosphosite 6:	DMP1	Q13316	S67	EQANEDPSDSTQSEE	71 / 7 AA	56
Phosphosite 7:	DMP1	Q13316	S69	ANEDPSDSTQSEEGL	71 / 7 AA	56
Phosphosite 8:	ACSS2	Q9NR19	T133	EGNEPGETTQITYHQ	71 / 7 AA	79
Phosphosite 9:	PLD1	Q13393	S971	LGYLDDPSEDIQDPV	62 / 8 AA	124
Phosphosite 10:	Neurofascin	O94856	S1334	ETEGNESSEATSPVN	62 / 8 AA	150
Phosphosite 11:	Neurofascin	O94856	S1333	EETEGNESSEATSPV	62 / 8 AA	150
Phosphosite 12:	JMJD1C	Q15652	S96	WAKRNDPSQTQGSKS	83 / 6 AA	285
Phosphosite 13:	ZFHX4	Q86UP3	S3315	PQNSNDASETKEDKS	55 / 9 AA	394
Phosphosite 14:	GPR37	O15354	S131	GARGQEPSETLGRGN	71 / 7 AA	67
Phosphosite 15:	C1orf31	Q5JTJ3	T121	GQFEPSETTAKS___	83 / 6 AA	14
Phosphosite 16:	SFRS8	Q12872	S161	GSDYYDPSEPTEEEE	62 / 8 AA	105
Phosphosite 17:	AlphaK2	Q86TB3	T1425	GKPEPSETTPQGARE	83 / 6 AA	237
Phosphosite 18:	RIF1	Q5UIP0	T1776	APVSPSETSQANPYS	83 / 6 AA	274
Phosphosite 19:	FLJ32110	A4D1E1	S908	KNCSSGPSETTESNT	62 / 8 AA	153
Phosphosite 20:	RNF122	Q9H9V4	S141	NKPIASPSEATQNIG	83 / 6 AA	17