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:	USP21
Human P-Site:	S187
P-Site Sequence:	HGSFHMISARSSEPF
UniProt:	Q9UK80
Intern. Prot. ID:	IPI00007262

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	USP21	Q9UK80	S187	HGSFHMISARSSEPF	100 / 9 AA	63
Phosphosite 1:	AMBRA1	Q9C0C7	S248	HNFLHMLSSRSSGIQ	66 / 9 AA	143
Phosphosite 2:	GIPC1	O14908	S222	RKAFDMISQRSAGGR	66 / 9 AA	36
Phosphosite 3:	RFX5	P48382	S237	LLQQHLISARSAHAH	75 / 8 AA	65
Phosphosite 4:	AMBRA1	Q9C0C7	S249	NFLHMLSSRSSGIQV	75 / 8 AA	143
Phosphosite 5:	GABRD	O14764	S296	TMTTLMVSARSSLPR	85 / 7 AA	51
Phosphosite 6:	PHACTR4	Q8IZ21	S339	SELLPMISPRSPSPP	55 / 9 AA	78
Phosphosite 7:	AOF1	Q8NB78	S555	GSNLHQVSARSWDHN	55 / 9 AA	92
Phosphosite 8:	MMP10	P09238	S329	EPEFHLISAFWPSLP	83 / 6 AA	54
Phosphosite 9:	VPS13A	Q96RL7	T1247	TNTFHMITESQSSPP	55 / 9 AA	360
Phosphosite 10:	MOSC2	Q969Z3	T104	KEDGHMVTARQEPRL	66 / 6 AA	38
Phosphosite 11:	GLI3	P10071	S160	IPPLHMTSALSSSPT	66 / 9 AA	170
Phosphosite 12:	MGAT4A	Q9UM21	S56	RIAEHRISQRSSELN	75 / 8 AA	62
Phosphosite 13:	AXIN2	Q9Y2T1	S648	KKAYPLESARSSPGE	55 / 9 AA	94
Phosphosite 14:	MON1A	Q86VX9	S353	HLLFNLISSSSSFRE	55 / 9 AA	62
Phosphosite 15:	TTN	Q8WZ42	S25383	TTTWHMVSATVARTT	66 / 6 AA	3816
Phosphosite 16:	TSC1	Q92574	S282	YSVSHQISARFPHRS	83 / 6 AA	130
Phosphosite 17:	Putative solute carrier family 22 member ENSG00000182157	A6NKX4	S317	ATELTMLSARSPQPR	55 / 9 AA	59
Phosphosite 18:	USP21	Q9UK80	S190	FHMISARSSEPFYSD	100 / 6 AA	63
Phosphosite 19:	FMO3	P31513	S213	TAEQVMISSRSGSWV	71 / 7 AA	60
Phosphosite 20:	IKBKAP	O95163	S1193	NSRISARSSKNRRKA	100 / 6 AA	150