Amphioxus (Branchiostoma floridae) has orthologs of vertebrate odorant receptors

Table 1 List of amino acid motifs used to search OR and non-OR sequence databases

	Motif	ORs	B. floridae ORs	Non-ORs
A	L..P.Y.L...L...D........P	5.79	4.92	0.04
A	L..P.Y.....L...D........P	44.43	8.20	0.06
A	L..P.......L...D.........P	47.11	77.05	7.56
A	L..P...L...L...D........P	6.71	73.77	5.39
B	L...M....Y...C.PL.Y	32.93	0.00	0.00
B	L...MA.D.Y...C.PL.Y	25.27	0.00	0.00
B	M....Y...C.PL.Y	52.94	67.21	0.17
B	MA.D.Y.AIC.PL.Y	37.57	0.00	0.01
B	MA.D.Y...C.PL.Y	41.69	37.70	0.10
B	MA.DRY.AIC.PL.Y	36.02	0.00	0.01
B	MA...Y...C.PL.Y	42.04	63.93	0.16
C	KA..T...H	73.48	14.75	0.24
C	KAF.....H	50.24	42.62	0.17
C	KA......H	75.05	47.54	1.54
C	K...T...H	83.32	18.03	1.29
D	NP..Y	68.90	75.41	40.03
D	NP..Y..R	46.41	65.57	2.45
D	NP..YG	7.87	21.31	6.17
D	NP..YS	36.43	54.10	2.11
D	NPIIY	13.63	42.62	9.74
D	P..NP..Y	57.32	0.00	0.59
D	PP..NP..Y	15.45	0.00	0.02
D	PS..NP..Y	0.28	3.28	0.01
D	S..NP..Y	0.97	65.57	21.65
D	S...NP..Y	2.57	62.30	8.36
D	SP..NP..Y	1.86	0.00	0.05
D	SS..NP..Y	0.15	62.30	2.77

This table contains the 27 amino acid motifs identified using the WebLogo of B. floridae and vertebrate ORs. The areas of conservation from which the motifs were derived are labelled A-D and correspond to the regions shaded in pink in Figure 2. All variable amino acid positions are denoted by periods. The OR motifs were used in regular expression searches of an OR sequence database (n = 5438), a non-OR database (n = 21 282) and a database of full-length and partial B. floridae ORs (n = 61). The occurrence of each motif in a given database is given as a percentage.

ISSN: 2730-7182