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:	MATN1
Human P-Site:	S388
P-Site Sequence:	IVFTDGRSQDYINDA
UniProt:	P21941
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	MATN1	P21941	S388	IVFTDGRSQDYINDA	100 / 9 AA	54
Phosphosite 1:	MATN4	O95460	S502	LVFTDGRSQDDISVW	88 / 9 AA	68
Phosphosite 2:	COL12A1	Q99715	S2437	VVVTDGRSQDEVKKA	77 / 9 AA	333
Phosphosite 3:	COL14A1	Q05707	S1146	VVITDGRSQDDVNKI	100 / 7 AA	194
Phosphosite 4:	TXNDC9	O14530	T154	ALLKDGKTQDYVVGF	62 / 8 AA	27
Phosphosite 5:	COL14A1	Q05707	S271	ILITDGKSQDDIIPP	77 / 9 AA	194
Phosphosite 6:	COL12A1	Q99715	S253	IIITDGKSQDEVEIP	66 / 9 AA	333
Phosphosite 7:	MATN1	P21941	Y391	TDGRSQDYINDAAKK	100 / 6 AA	54
Phosphosite 8:	EIF3C	Q99613	S466	MQNTDPHSQEYVEHL	55 / 9 AA	105
Phosphosite 9:	RIMS1	Q86UR5	S324	RRLEKGRSQDYPDTP	100 / 6 AA	189
Phosphosite 10:	COL6A6	A6NMZ7	S1114	LVLTDGQSQDEVAQA	66 / 9 AA	247
Phosphosite 11:	COL12A1	Q99715	S1312	VLITDGKSQDDVEAP	66 / 9 AA	333
Phosphosite 12:	COL21A1	Q96P44	S147	VVLTDGKSQDDVKDA	66 / 9 AA	99
Phosphosite 13:	JMJD2B	O94953	Y1078	DSGRSQDYVAFVESL	83 / 6 AA	122
Phosphosite 14:	PLCL4	O75038	S1080	GSQTDGRSQPRTLGH	100 / 6 AA	68
Phosphosite 15:	KIAA1853	A7MD48	S282	LTTSRGRSQEYDSGN	83 / 6 AA	69
Phosphosite 16:	ALS2CL	Q60I27	Y639	ELRRSQDYLSCERTH	83 / 6 AA	108
Phosphosite 17:	PTPRU	Q92729	S1229	LISTDGDSNNYINAA	66 / 9 AA	160
Phosphosite 18:	ALS2CL	Q60I27	S636	SSRELRRSQDYLSCE	83 / 6 AA	108
Phosphosite 19:	ABCC10	Q5T3U5	S55	CYLGTPRSPDYILPC	83 / 6 AA	162
Phosphosite 20:	USP28	Q96RU2	S714	ESSTNSSSQDYSTSQ	62 / 8 AA	122