- Plant Cylins
The first cyclins identified in plants were from carrot and soybean [146]. One partial length carrot clone
and two soybean clones (one full length, one partial length) were reported. Their sequences were mitotic-
like but, as has been shown to be the case with other plant cyclins isolated to date, they could not be clas-
sified as either A- or B-type cyclins [146]. Since that report, cyclins have been identified in Adiantum
capillus-venerisL. [147], alfalfa [148–150], Antirrhinum[100],Arabidopsis[21,124,151–156],Brassica
[157],Catharanthus roseus[158],Lupinus luteus[159,160], maize [161–163], pea [21], rice [164,165],
Sesbania rostrata[166], soybean [167], and tobacco [168,169]. See Table 5.
The majority of the plant cyclins were reported to have mitotic-like sequences based on the presence
of the destruction box motif in their amino terminal end and homology to animal mitotic-cyclin se-
quences. Comparison of these mitotic-like cyclins with animal A- and B-type cyclins showed that they
had sequence homologies to both types and so they could not be definitively classified as A- or B-type
cyclins [101,161,167]. Comparative analysis of a large number of plant cyclins that have been isolated
has revealed that the A/B family of cyclins possesses two distinct B-type groups and three distinct A-type
238 REDDY AND DAYTABLE 5 Plant Cyclins
Dest motifb
Plant Gene name Aaa RXXLX2–4N/PEST Reference
Adiantum Adica;CycA1;1 532 RAALANLTN 147
Alfalfa Medsa;CycB2;1 428 RRALGVIN 148
Medsa;CycB2;2 434 RALGGINQ 148, 149
Medsa;CycB2;3 428 RRALGVIN 150
Medsa;CycA2;1 452 RAILQDVTN 149
Medsa;CycD3;1 386 PEST 219
Antirrhinum Antma;CycB1;1 473 RRALGDIGN 100
Antma;CycB1;2 441 RRALGDIGN 100
Arabidopsis Arath;CycB1;1 428 RQVLGDIGN 124
Arath;CycB1;2 445 RRALGDIGN 152, 153
Arath;CycB1;3 414 RRALGDIGN 153, 154
Arath;CycB2;1 428 RRVLRVIN 151
Arath;CycB2;2 429 RRALGVINH 151
Arath;CycA2;1 445 AKALGVSN 151
Arath;CycA2;2 437 RAVLKDVSN 151
Arath;CycD1;1 334 PEST 155
Arath;CycD2;1 383 PEST 155
Arath;CycD3;1 376 PEST 155
Brassicac Brana;CycA2;1 434 RAVLGDISN 157
Brana;CycA1;1 425 d RAPLGNITN 157
Catharanthus Catro;CycA3;1 372 RVVLGELKN 158
Catro;CycB1;1 436 RRALGDIGN 158
Carrot Dauca;CycA3;1 341 e RVVLGEISN 146
Lupinus Luplu;CycB1;1 429 RRVLKDIGN 159
Luplu;CycB1;2 454 RVVLGDIGN 159, 160
Luplu;CycB1;3 460 RRALGDIGN 159, 160
Luplu;CycB1;4 452 RKALGDIGN 159, 160
Maize Zeama;CycA1;2 503 Not reported 162
Zeama;CycB1;1 420 e RAPLGDIGN 161
Zeama;CycA1;1 456 e RASVGSLGN 161
Zeama;CycB2;1 424 RRALSDIKN 161
Zeama;CycB1;2 445 RRALGDIGN 161
Pea Pissa;CycA2;1 472 RAALHDIGN 21
Pissa;CycA2;2 449 RAGLTDVTN 21
Pissa;CycB1;1 566 RAILHDVTN 21
Rice Orysa;CycA1;1 508 RVALSNISN 164
Orysa;CycB2;1 420 RRPLRDINN 164
Orysa;CycB2;2 419 RRALRDIKN 165
Sesbania Sesro;CycB1;1 445 RKALGDIGN 166