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Table 1 Small size mutants identified in the genome-wide screen in fission yeast

From: A systematic screen reveals new elements acting at the G2/M cell cycle control

Gene

Cell length at divisiona (μm)

CVb (%)

Cell widthc (μm)

Cell volumed (μm3)

Doubling timee (min)

Molecular function

Biological process

S. cerevisiaeorthologs

wee1

7.4 ± 0.7

9.5

4.1 ± 0.2

80.5 ± 12.6

214 ± 10.4f

Protein kinase

G2/M transition

SWE1

pka1

10.5 ± 0.7

6.7

4.7 ± 0.2

153 ± 20.8

159 ± 2.3

cAMP-dependent protein kinase

Glucose sensing/cAMP signaling

TPK1, TPK2, TPK3

gpa2

10.9 ± 0.9

8.3

4.5 ± 0.3

151.9 ± 18

181 ± 1.3

G protein, α-subunit

 

GPA2

git5

12.9 ± 0.9

7.0

4.5 ± 0.2

179.6 ± 17.3

142 ± 4.9

G protein, β-subunit

 

STE4

git3

12.7 ± 0.8

6.3

4.6 ±0.2

183.9 ± 24.8

145 ± 3.8

G-protein coupled receptor

 

GPR1

zfs1

12.3 ± 0.7

5.7

4.1± 0.2

142.7 ± 13.6

140 ± 4.1

RNA binding

mRNA degradation

CTH1, TIS11

ski3

12.4 ± 0.6

4.8

4.3 ± 0.2

162.2 ± 15.1

135 ± 1.6

SKI complex component

 

SKI3

clp1

11.9 ± 0.9

7.6

4.4 ± 0.2

157.7 ± 15.8

138 ± 0.7

Protein phosphatase

G2/M transition cytokinesis

CDC14

pom1

12.3 ± 1.6

13.0

4.5 ± 0.2

174.1 ± 31.1

141 ± 5.3

Protein kinase

  

nif1

12.5 ± 0.7

5.6

4.3 ± 0.2

159.6 ± 15.2

128 ± 2.3

Protein kinase inhibitor

G2/M transition

DSF2

snf5

12.6 ± 0.7

5.6

4.3 ± 0.2

163.8 ± 15.9

135 ± 1.6

SWI/SNF subunit

Chromatin remodeling

SNF5

sol1

12.9 ± 0.9

7.0

4.3 ± 0.2

162.9 ± 19.6

135 ± 4.4

SWI/SNF subunit

 

SWI1

sgf73

12.7 ± 0.8

6.3

4.2 ± 0.3

157.0 ± 20.9

159 ± 5.1

SAGA subunit

Histone modification

SGF73

pab2

13.1 ± 0.8

6.1

4.3 ± 0.2

165.7 ± 19.3

143 ± 4.7

RNA binding

mRNA poly(A) tail length

SGN1

SPBC19F8.02

12.6 ± 0.6

4.8

4.3 ± 0.2

160.6 ± 14.1

134 ± 1.5

NA

NA

 

SPAC27E2.03c

12.3 ± 0.7

5.7

4.3 ± 0.2

160.3 ± 18.4

157 ± 6.1

GTP binding

NA

OLA1

ppa2

11.2 ± 1.0

8.9

4.3 ± 0.2

139.7 ± 15.9

136 ± 1.2

Protein phosphatase

Signal transduction

PPH21, PPH22

pyp1

11.3 ± 0.6

5.3

4.7 ± 0.2

166.2 ± 15.8

143 ± 4.7

Protein phosphatase

Stress-response MAPK cascade

PTP2, PTP3

WT

14.1 ± 0.8

5.7

4.5 ± 0.2

199.4 ± 21.8

129 ± 2.2

   
  1. Genes in bold are those that have not been previously implicated in cell cycle control. aMean ± standard deviation (SD), n = 60. bCoefficient of variance. cCell width was measured at the center of the cell. Mean values ± SD (n = 60). dCell volume was estimated assuming S. pombe cell shape as a cylinder topped with two hemispheres (V = (4/3) × π × (Width/2)3 + π × (Width/2)2 × (Length - Width)). Mean values ± SD (n = 60). eMean ± standard error (n = 3). fThe doubling time for wee1Δ was longer than that reported for the temperature sensitive wee1-50 mutant at restrictive temperature [3]. This is likely due to the accumulation of diploid cells and cells with aberrant septa in the deletion mutant. MAPK, mitogen-activated protein kinase; NA, not available.