Abstract
A multifunctional calcium-binding protein, centrin-1, is specifically expressed in male germ cells, certain neurons and ciliated cells. We identified centrin-1 as a protein interacting with SUMO-2/3 using yeast two-hybrid screening of a mouse testicular cDNA library. In bead halo assays, the interaction between centrin-1 and SUMO-2/3 was reduced in the presence of EGTA and facilitated by the addition of CaCl₂. immunostaining of seminiferous tubules in 35-day-old mouse testes revealed that cells in the layer containing spermatogonia showed colocalization of SUMO-2/3 with centrin-1 in cytoplasmic spots. Identification of centrin-1 as the EGTA-sensitive SUMO-2/3-interacting protein indicates the possible role of calcium in modulating the centrin-1-SUMO-2/3 interaction and suggests the importance of this interaction in mouse testis.
Copyright © 2010 John Wiley & Sons, Ltd.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Calcium / metabolism*
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Calcium-Binding Proteins / chemistry*
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Calcium-Binding Proteins / genetics
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Calcium-Binding Proteins / metabolism*
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Centrosome / metabolism
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Chelating Agents / chemistry
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Chromosomal Proteins, Non-Histone / chemistry*
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Chromosomal Proteins, Non-Histone / genetics
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Chromosomal Proteins, Non-Histone / metabolism*
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EF Hand Motifs*
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Egtazic Acid / chemistry
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Gene Library
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HeLa Cells
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Humans
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Male
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Mice
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Mice, Inbred C57BL
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Protein Transport
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Recombinant Fusion Proteins / biosynthesis
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Recombinant Fusion Proteins / metabolism
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Seminiferous Tubules / cytology
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Seminiferous Tubules / metabolism*
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Small Ubiquitin-Related Modifier Proteins / genetics
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Small Ubiquitin-Related Modifier Proteins / metabolism*
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Spermatogonia / cytology
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Spermatogonia / metabolism*
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Ubiquitins / genetics
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Ubiquitins / metabolism
Substances
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Calcium-Binding Proteins
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Chelating Agents
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Chromosomal Proteins, Non-Histone
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Recombinant Fusion Proteins
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SUMO2 protein, mouse
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Small Ubiquitin-Related Modifier Proteins
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Sumo3 protein, mouse
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Ubiquitins
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caltractin
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Egtazic Acid
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Calcium