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:	S162
P-Site Sequence:	PRASGDRSRQKQQWP
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	S162	PRASGDRSRQKQQWP	100 / 9 AA	91
Phosphosite 1:	PAICS	P22234	S223	LWPSGDRSQQKDKQS	87 / 8 AA	47
Phosphosite 2:	Kv7.2	O43526	S490	SWSFGDRSRARQAFR	75 / 8 AA	96
Phosphosite 3:	AMBRA1	Q9C0C7	S786	FEDNGDRSRHRAPRN	62 / 8 AA	143
Phosphosite 4:	CTTNBP2NL	Q9P2B4	S173	SQLEEERSRHKQLSS	71 / 7 AA	70
Phosphosite 5:	FLG	P20930	S3271	HGHSADRSRQSGTRH	85 / 7 AA	435
Phosphosite 6:	C10orf92	Q8IYW2	S341	LHLSGDRSRLYGAAY	85 / 7 AA	95
Phosphosite 7:	IQGAP2	Q13586	S312	EGTENERSRQKYAEE	71 / 7 AA	181
Phosphosite 8:	FAM53A	Q6NSI3	S270	CVLSGKRSRRKRRRE	66 / 9 AA	43
Phosphosite 9:	STK10	O94804	S387	SQPSGDRSLQTTSPP	75 / 8 AA	112
Phosphosite 10:	PTCHD2	Q9P2K9	S165	QLHLGNRSRQASRAP	83 / 6 AA	153
Phosphosite 11:	LEFTY1	O75610	S73	QRSHGDRSRGKRFSQ	75 / 8 AA	41
Phosphosite 12:	LEFTY2	O00292	S73	RRSHGDRSRGKRFSQ	75 / 8 AA	41
Phosphosite 13:	SMC3	Q9UQE7	S253	RETSGEKSRQLRDAQ	71 / 7 AA	142
Phosphosite 14:	KIF18B	Q86Y91	S516	RELDGDRSKQLALKV	83 / 6 AA	92
Phosphosite 15:	CASKIN1	Q8WXD9	S1368	EGASPGDSARQKLEE	62 / 8 AA	150
Phosphosite 16:	STX8	Q9UNK0	S163	DALSSIISRQKQMGQ	66 / 9 AA	27
Phosphosite 17:	HECTD3	Q5T447	S697	VVGYGDRSRFIQLVQ	75 / 8 AA	97
Phosphosite 18:	PRPF3	O43395	S86	SKSSSDRSRKRELKE	55 / 9 AA	78
Phosphosite 19:	C1orf177	Q3ZCV2	S243	DTFSGDRSKPLPYGH	71 / 7 AA	48
Phosphosite 20:	MARK4	Q96L34	S557	APPSGERSRLARGST	83 / 6 AA	83