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Gene Review

CAP2  -  F-actin-capping protein subunit beta

Saccharomyces cerevisiae S288c

Synonyms: YIL034C
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Disease relevance of CAP2

  • Expression of CAP2, an APETALA2-Family Transcription Factor from Chickpea, Enhances Growth and Tolerance to Dehydration and Salt Stress in Transgenic Tobacco [1].
  • We have amplified and cloned cDNAs from a human glioblastoma library that encode a second CAP-related protein, CAP2 [2].

High impact information on CAP2

  • Yeast cells in which the CAP2 gene was disrupted by an insertion or a deletion had an abnormal actin distribution, including the loss of actin cables [3].
  • Null mutants of capping protein, prepared by deletion of the coding region of CAP1 and CAP2 separately or together, are viable and have a similar phenotype [4].
  • One of the two subunits is the product of the CAP2 gene, which we previously identified as the gene encoding the beta subunit of capping protein based on its sequence similarity to capping protein beta subunits in chicken and Dictyostelium (Amatruda, J. F., J. F. Cannon, K. Tatchell, C. Hug, and J. A. Cooper. 1990. Nature (Lond.) 344:352-354) [5].
  • Transcript level of CAP2 increased by dehydration and by treatment with sodium chloride, abscisic acid, and auxin, but not by treatment with low temperature, salicylic acid, and jasmonic acid [1].
  • The 35S promoter-driven expression of CAP2 in tobacco (Nicotiana tabacum) caused drastic increase in the leaf cell size, and, thereby, in leaf surface area and number of lateral roots [1].

Biological context of CAP2


Associations of CAP2 with chemical compounds

  • We also isolated four CAG/CTG repeats from within the region using CAG/CTG YAC fragmentation, one of which is located in the 5' untranslated region of the CAP2 gene coding for a brain-expressed serine proteinase inhibitor [7].


  1. Expression of CAP2, an APETALA2-Family Transcription Factor from Chickpea, Enhances Growth and Tolerance to Dehydration and Salt Stress in Transgenic Tobacco. Shukla, R.K., Raha, S., Tripathi, V., Chattopadhyay, D. Plant Physiol. (2006) [Pubmed]
  2. Comparison of human CAP and CAP2, homologs of the yeast adenylyl cyclase-associated proteins. Yu, G., Swiston, J., Young, D. J. Cell. Sci. (1994) [Pubmed]
  3. Disruption of the actin cytoskeleton in yeast capping protein mutants. Amatruda, J.F., Cannon, J.F., Tatchell, K., Hug, C., Cooper, J.A. Nature (1990) [Pubmed]
  4. Effects of null mutations and overexpression of capping protein on morphogenesis, actin distribution and polarized secretion in yeast. Amatruda, J.F., Gattermeir, D.J., Karpova, T.S., Cooper, J.A. J. Cell Biol. (1992) [Pubmed]
  5. Purification, characterization, and immunofluorescence localization of Saccharomyces cerevisiae capping protein. Amatruda, J.F., Cooper, J.A. J. Cell Biol. (1992) [Pubmed]
  6. Mutations that enhance the cap2 null mutant phenotype in Saccharomyces cerevisiae affect the actin cytoskeleton, morphogenesis and pattern of growth. Karpova, T.S., Lepetit, M.M., Cooper, J.A. Genetics (1993) [Pubmed]
  7. No evidence for the involvement of CAG/CTG repeats from within 18q21.33-q23 in bipolar disorder. Goossens, D., Villafuerte, S., Tissir, F., Van Gestel, S., Claes, S., Souery, D., Massat, I., Van den Bossche, D., Van Zand, K., Mendlewicz, J., Van Broeckhoven, C., Del-Favero, J. Eur. J. Hum. Genet. (2000) [Pubmed]
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