Abstract
The construction of a normalized cDNA library is a popular tool for identifying novel biomarkers for monitoring environmental pollution. In the present study, a normalized cDNA library was constructed from the river snail Bellamya aeruginosa after exposure to Cu2+ by using the SMART technique. The titer of the cDNA library was 1.78 × 106 pfu/ml, with a recombinant efficiency of 95.8%. In addition, from 6,000 randomly selected and sequenced clones, 5,473 high-quality ESTs were identified. After processing the sequences, 3,961 unigenes representing 897 contigs and 3,064 singlets were obtained with 27.6% redundancy. Analysis of expressed sequenced tags using COG and GO annotation and KEGG pathway data showed that a large group of genes related to growth and development, signal transduction, and defense mechanisms were present in the cDNA library. Based on our findings, this normalized cDNA library will provide a valuable resource for further research on functional genes and ecotoxicology in B. aeruginosa.
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Abbreviations
- ESTs:
-
Expressed sequenced tags
- COG:
-
Clusters of orthologous groups of proteins
- GO:
-
Gene ontology
- DSN:
-
Duplex-specific nuclease
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Financial supports by National Basic Research Program of China Grant (2007CB407306), Water Pollution Control and Management (2009ZX07528-003) and China’s new environmental problems (2009467109) are gratefully acknowledged.
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Li, ZC., An, LH., Fu, Q. et al. Construction and characterization of a normalized cDNA library from the river snail Bellamya aeruginosa after exposure to copper. Ecotoxicology 21, 260–267 (2012). https://doi.org/10.1007/s10646-011-0786-y
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DOI: https://doi.org/10.1007/s10646-011-0786-y