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:	MARCH-X
Human P-Site:	S456
P-Site Sequence:	NSLDYFISGRPISPR
UniProt:	Q8NA82
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	MARCH-X	Q8NA82	S456	NSLDYFISGRPISPR	100 / 9 AA	91
Phosphosite 1:	USP32	Q8NFA0	S764	PLTQYFISGRHLYEL	66 / 9 AA	182
Phosphosite 2:	USP6	P35125	S562	PLTQYFISGRHLYEL	66 / 9 AA	159
Phosphosite 3:	PHF1	O43189	S318	SHKDRFISGREIKKR	77 / 9 AA	62
Phosphosite 4:	MARCH-X	Q8NA82	Y453	SSQNSLDYFISGRPI	100 / 6 AA	91
Phosphosite 5:	RASA1	P20936	Y240	IAMCGDYYIGGRRFS	71 / 7 AA	116
Phosphosite 6:	UBTD2	Q8WUN7	S197	GSQRWFFSGRPLTDK	62 / 8 AA	26
Phosphosite 7:	GALNT7	Q86SF2	Y481	DEYKDYFYASRPESQ	62 / 8 AA	75
Phosphosite 8:	CGNL1	Q0VF96	S253	GEEALFTSGRPLTAH	71 / 7 AA	149
Phosphosite 9:	TTN	Q8WZ42	S29599	FTIDVPISGRPAPKV	75 / 8 AA	3816
Phosphosite 10:	PLCZ1	Q86YW0	S167	PLNDYFISSSHNTYL	62 / 8 AA	70
Phosphosite 11:	FBN3	Q75N90	S979	FASRDFLSGRPFYKD	71 / 7 AA	300
Phosphosite 12:	UNC80	Q8N2C7	S1005	EECRSFMSGRPSQTP	83 / 6 AA	363
Phosphosite 13:	USP32	Q8NFA0	Y761	NTQPLTQYFISGRHL	83 / 6 AA	182
Phosphosite 14:	USP6	P35125	Y559	NTQPLTQYFISGRHL	83 / 6 AA	159
Phosphosite 15:	TBCE	Q15813	S244	ESNNIFISERPTDVL	62 / 8 AA	59
Phosphosite 16:	PLCZ1	Q86YW0	Y164	MTHPLNDYFISSSHN	83 / 6 AA	70
Phosphosite 17:	ZNF650	Q6ZT12	Y727	ASRLDPDYFISSVFE	83 / 6 AA	84
Phosphosite 18:	LZTS2	Q9BRK4	S34	GSVSSLISGRPCPGG	83 / 6 AA	73
Phosphosite 19:	GPATCH8	Q9UKJ3	S1041	QSPHYFRSGRGEGPG	71 / 7 AA	164
Phosphosite 20:	SDR42E1	Q8WUS8	S255	SGQPYFISDGRPVNN	87 / 8 AA	44