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Published on: March 24, 2017
Epitopes of human testis-specific lactate dehydrogenase deduced from a cDNA sequence
Summary
Researchers analyzed the human testis-specific L-lactate dehydrogenase (LDHC4) gene sequence. This finding aids in developing human-specific contraceptive vaccines by revealing significant differences from rodent counterparts.
Area of Science:
- Biochemistry
- Genetics
- Reproductive Biology
Background:
- L-lactate dehydrogenase (LDH) isozymes play crucial roles in cellular metabolism.
- The testis-specific isozyme, LDHC4 (also known as LDHX), has unique characteristics.
- Understanding LDHC4's structure is vital for reproductive health research.
Purpose of the Study:
- To determine the complete protein coding sequence and structure of human LDHC4.
- To compare human LDHC4 with homologous proteins from other species.
- To identify potential targets for contraceptive vaccine development.
Main Methods:
- Analysis of a complementary DNA (cDNA) clone encoding the full protein.
- Deduction of the amino acid sequence from the cDNA.
- Comparative sequence homology analysis with other LDH isozymes.
Main Results:
- The deduced amino acid sequence of human LDHC4 shows significant differences from rodent LDHC4, human LDHA4, and porcine LDHB4.
- Subunit homologies suggest the LDHC gene originated from at least two independent duplication events.
- Higher mutation rates in mammalian LDHC genes compared to LDHA and LDHB genes are indicated.
Conclusions:
- Human LDHC4 sequence analysis reveals substantial divergence from homologous proteins.
- Significant differences in antigenic determinants between human and mouse LDHC4 were observed.
- Knowledge of the human LDHC4 sequence is instrumental for designing human-specific peptides for contraceptive vaccine development.
