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:	HERV-K_11q22.1 provirus ancestral Env polyprotein
Human P-Site:	S281
P-Site Sequence:	NCSGQTQSCPSAQVS
UniProt:	P61570
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	HERV-K_11q22.1 provirus ancestral Env polyprotein	P61570	S281	NCSGQTQSCPSAQVS	100 / 9 AA	75
Phosphosite 1:	ERVK5	Q9HDB8	S170	NCSGQTQSCPSAQVS	100 / 9 AA	28
Phosphosite 2:	HERV-K_1q22 provirus ancestral Pol protein	P63135	S1041	NCSGQTQSCPSAQVS	100 / 9 AA	165
Phosphosite 3:	HERV-K_1q22 provirus ancestral Env polyprotein	P61567	S170	NCSGQTQSCPSAQVS	100 / 9 AA	67
Phosphosite 4:	HERV-K_22q11.21 provirus ancestral Env polyprotein	P61566	S170	NCSGQTQSCPSAQVS	100 / 9 AA	67
Phosphosite 5:	HERV-K_1q23.3 provirus ancestral Env polyprotein	O42043	S170	NCSGQTQSCPSAQVS	100 / 9 AA	64
Phosphosite 6:	NLRP8	Q86W28	S419	RGNNLTQSCPNATSV	85 / 7 AA	119
Phosphosite 7:	CCDC99	Q96EA4	S489	PQKEETQSCPNSLED	62 / 8 AA	70
Phosphosite 8:	ERBB3	P21860	T1238	LSASLGSTQSCPLHP	85 / 7 AA	148
Phosphosite 9:	ERBB3	P21860	S1240	ASLGSTQSCPLHPVP	85 / 7 AA	148
Phosphosite 10:	ERVK5	Q9HDB8	S173	GQTQSCPSAQVSPAV	100 / 6 AA	28
Phosphosite 11:	HERV-K_1q22 provirus ancestral Pol protein	P63135	S1044	GQTQSCPSAQVSPAV	100 / 6 AA	165
Phosphosite 12:	HERV-K_11q22.1 provirus ancestral Env polyprotein	P61570	S284	GQTQSCPSAQVSPAV	100 / 6 AA	75
Phosphosite 13:	HERV-K_1q22 provirus ancestral Env polyprotein	P61567	S173	GQTQSCPSAQVSPAV	100 / 6 AA	67
Phosphosite 14:	HERV-K_22q11.21 provirus ancestral Env polyprotein	P61566	S173	GQTQSCPSAQVSPAV	100 / 6 AA	67
Phosphosite 15:	HERV-K_1q23.3 provirus ancestral Env polyprotein	O42043	S173	GQTQSCPSAQVSPAV	100 / 6 AA	64
Phosphosite 16:	ZBTB39	O15060	S146	ESHSGTLSCPSAEPA	85 / 7 AA	79
Phosphosite 17:	CCDC99	Q96EA4	T487	LPPQKEETQSCPNSL	71 / 7 AA	70
Phosphosite 18:	CSPP1	Q1MSJ5	S711	SGHMQTQSSPFARGN	75 / 8 AA	142
Phosphosite 19:	CSPP1	Q1MSJ5	S712	GHMQTQSSPFARGNV	75 / 8 AA	142
Phosphosite 20:	FCN1	O00602	S110	GDAGQSQSCATGPRN	55 / 9 AA	35