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:	MATR3
Human P-Site:	S275
P-Site Sequence:	KKRGAPPSSNIEDFH
UniProt:	P43243
Intern. Prot. ID:	IPI00017297

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	MATR3	P43243	S275	KKRGAPPSSNIEDFH	100 / 9 AA	95
Phosphosite 1:	MATR3	P43243	S276	KRGAPPSSNIEDFHG	100 / 8 AA	95
Phosphosite 2:	TSC22D1	Q15714	S761	IQQGAPPSSQVVPPA	75 / 8 AA	110
Phosphosite 3:	HLCS	P50747	S341	HLELPPSSNIVQTPE	100 / 6 AA	81
Phosphosite 4:	HLCS	P50747	S340	VHLELPPSSNIVQTP	100 / 6 AA	81
Phosphosite 5:	C12orf50	Q8NA57	S44	GLFLPPSSNITLQKE	100 / 6 AA	47
Phosphosite 6:	C12orf50	Q8NA57	S43	NGLFLPPSSNITLQK	100 / 6 AA	47
Phosphosite 7:	USP4	Q13107	S294	YNCQEPPSSHIQPGL	71 / 7 AA	109
Phosphosite 8:	DDX24	Q9GZR7	S268	RNAAPPPSNTEAPPG	75 / 8 AA	96
Phosphosite 9:	OPRM1	P35372	S357	REFCIPTSSNIEQQN	85 / 7 AA	45
Phosphosite 10:	USP4	Q13107	S295	NCQEPPSSHIQPGLC	71 / 7 AA	109
Phosphosite 11:	FREM1	Q5H8C1	S254	YQHLDPPSPNIDYIS	71 / 7 AA	244
Phosphosite 12:	NEDD4	P46934	S707	AFPSPPPSSNLDVPT	55 / 9 AA	149
Phosphosite 13:	NEDD4	P46934	S708	FPSPPPSSNLDVPTH	62 / 8 AA	149
Phosphosite 14:	RGSL1	A5PLK6	S847	SGRSAPPSTNVRSAD	62 / 8 AA	126
Phosphosite 15:	DENND4C	Q5VZ89	S1658	QKIDAPPSASVEWCR	55 / 9 AA	187
Phosphosite 16:	SEC23IP	Q9Y6Y8	S147	AQPGAPPSSLMGINS	75 / 8 AA	111
Phosphosite 17:	DIS3	Q9Y2L1	S697	KHPAPPPSNYEILVK	75 / 8 AA	109
Phosphosite 18:	RGSL1	A5PLK6	T848	GRSAPPSTNVRSADQ	71 / 7 AA	126
Phosphosite 19:	SEC31L1	O94979	S963	GGPGAPPSSSAYALP	85 / 7 AA	133
Phosphosite 20:	TMEM143	Q96AN5	S455	EPPQATPSSNIS___	85 / 7 AA	52