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Table 1 The number of G protein-coupled receptors predicted in the non-Rhodopsin GPCR families/subfamilies of Ciona in comparison with the human genome

From: The repertoire of G protein-coupled receptors in the sea squirt Ciona intestinalis

Receptor

Human *

Ciona

Adhesion

  

CELSR

3

1

HE6/GPR126

1+1

1

GPR112/GPR128/GPR97/GPR56/GPR114

1+1+1+1+1

-

LEC/ETL

3+1

3

CD97/EMR/GPR127

1+3+1

-

BAI

3

-

GPR133/GPR144

1+1

-

VLGR1

1

-

GP123/124/125-like

1+1+1

1

GPR110/111/113/115/116

1+1+1+1+1

-

Unclassified Ciona ADH

-

24

Frizzled

  

Frizzled

10

3

Smoothened

1

1

TAS2

25

-

Glutamate

  

CASR

1

1

GABAB

2

3

Metabotropic Glutamate

8

3

RAIG

4

1

Taste1

4

-

Secretin

  

CALCRL/CRHR

2+2

1+2

GLPR/GCGR/GIPR

2+1+1

3+0+0

PTHR

2

2

GHRHR/PACAP/SCTR/VIPR

1+2+1+1

-

cAMP GPCR- like

-

1

Methuselah-like

-

1

GPR107 (LUTR)-like

1

1

  1. * Numbers and abbreviations are as described in [5, 8].