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:	USP53
Human P-Site:	S421
P-Site Sequence:	SSSNRSHSHTGVGKG
UniProt:	Q70EK8
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	USP53	Q70EK8	S421	SSSNRSHSHTGVGKG	100 / 9 AA	121
Phosphosite 1:	USP53	Q70EK8	T423	SNRSHSHTGVGKGPA	100 / 7 AA	121
Phosphosite 2:	USP53	Q70EK8	S419	NISSSNRSHSHTGVG	100 / 7 AA	121
Phosphosite 3:	FAM65A	Q6ZS17	S22	ARVNRSQSFAGVLGS	66 / 9 AA	132
Phosphosite 4:	STOX2	Q9P2F5	S472	SKVHRSHSHTQDRRS	85 / 7 AA	103
Phosphosite 5:	RPAP1	Q9BWH6	S266	VAFLRSHSHTQEQTG	100 / 6 AA	153
Phosphosite 6:	RPAP1	Q9BWH6	S264	SLVAFLRSHSHTQEQ	100 / 6 AA	153
Phosphosite 7:	ZNF77	Q15935	S157	AFENRQRSHTGQRPC	75 / 8 AA	62
Phosphosite 8:	ZNF843	Q8N446	S90	SPLGRSHSSAGVRQG	75 / 8 AA	37
Phosphosite 9:	CPXCR1	Q8N123	S112	PLNDRSRSHSGKVEM	62 / 8 AA	35
Phosphosite 10:	SRRM2	Q9UQ35	S474	AKRDKSHSHTPSRRM	71 / 7 AA	300
Phosphosite 11:	ZNF843	Q8N446	S91	PLGRSHSSAGVRQGF	75 / 8 AA	37
Phosphosite 12:	SDK1	Q7Z5N4	S683	VSPNSSHSHAVVLSW	66 / 9 AA	242
Phosphosite 13:	SRRM2	Q9UQ35	S472	GRAKRDKSHSHTPSR	71 / 7 AA	300
Phosphosite 14:	KIAA1797	Q5VW36	T1635	RIVSHANTGVLKRME	71 / 7 AA	200
Phosphosite 15:	STARD9	Q9P2P6	S2336	AMGSHSQSGVPESIP	71 / 7 AA	507
Phosphosite 16:	Uncharacterized protein FLJ39582	Q8N8F4	S28	KTRARTHSRTGEVDF	71 / 7 AA	19
Phosphosite 17:	STARD9	Q9P2P6	S2334	SMAMGSHSQSGVPES	71 / 7 AA	507
Phosphosite 18:	PBX1	P40424	S10	EQPRLMHSHAGVGMA	83 / 6 AA	47
Phosphosite 19:	FLJ23588	Q5THR3	S13	IIPDWLRSHPHTRKF	83 / 6 AA	173
Phosphosite 20:	ZNF490	Q9ULM2	T469	RRHERSHTGVKPCEC	83 / 6 AA	61