The evolution of nuclear auxin signalling

Table 1 Number of ARFs and Aux/IAA with different domains and motifs.

Proteins	P.p.	S.m.	A.t.	P.t. *	O.s.	S.b.	V.v.	G.m.
ARF with DBD domain
Total number	12	7	23	38 (39)	25	25	20	59
No III &IV domain	1	1	4	12 (6)	6	6	5	12
Q-rich	0	3	4**	8 (10)	8	8	3	18
ARF without DBD domain
Only III&IV domain	1	4	0	11 (0)	0	0	0	8
Q-rich, no DBD domain	2	2	0	0 (0)	0	0	0	0
Aux/IAA
Total number	3	3	29	33 (35)	33	26	27	62
LxLxL	0	2	28	23 (31)	27	21	17	55
LxLxPP	3	1	3	0 (6)	3	3	2	4
No domain II	0	0	5	1 (2)	6	2	8	21
No KR domain	0	0	10	9 (10)	11	7	9	22

(P.p. – P. patens, S.m. – S. moellendorffii, A.t. – A. thaliana, P.t. – P. trichocarpa, O.s. – O. sativa, S.b. – S. bicolor, V.v. – Vitis vinifera G.m – G. max).
* The number of ARFs and Aux/IAAs from Kalluri et al. [27] is shown in brackets.
** In addition, one A. thaliana ARF, ARF5, has a methionine-rich middle region.

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