Alternative titles; symbols
Fisher et al. (1977) interpreted diaphorase isozymes in terms of 3 loci, DIA1 (613213), DIA2 (600941), and DIA3. DIA3 codes for the polymorphic sperm diaphorase; the products of this locus are found also in fetal tissues, including placenta, and in adult brain and gonads. The products of the 3 loci differ in substrate specificity, thermostability and molecular size.
Electrophoretic variants of DIA3 were first demonstrated by Caldwell et al. (1976), who referred to it as 'sperm diaphorase.' Since DIA3 activity occurs also in ovary, oviduct and uterus, 'gonadal diaphorase' is a preferred term.
DIA3 shows 3 common alleles (Kuhnl et al., 1977) and, in Japanese, 2 additional rare alleles (Sebetan and Kudo, 1986). Pawlowski (1990) described a rare variant.
Data on gene frequencies of allelic variants were tabulated by Roychoudhury and Nei (1988).
Caldwell, K., Blake, E. T., Sensabaugh, G. F. Sperm diaphorase: genetic polymorphism of a sperm-specific enzyme in man. Science 191: 1185-1187, 1976. [PubMed: 3851] [Full Text: https://doi.org/10.1126/science.3851]
Edwards, Y. H., Potter, J. E., Hopkinson, D. A. A comparison of the biochemical properties of the human diaphorase (DIA-3) isozymes determined by the common alleles 1, 2 and 3. Ann. Hum. Genet. 42: 293-302, 1979. [PubMed: 434772] [Full Text: https://doi.org/10.1111/j.1469-1809.1979.tb00663.x]
Fisher, R. A., Edwards, Y. H., Putt, W., Potter, J. An interpretation of human diaphorase isozymes in terms of three gene loci DIA-1, DIA-2, and DIA-3. Ann. Hum. Genet. 41: 139-149, 1977. [PubMed: 563699] [Full Text: https://doi.org/10.1111/j.1469-1809.1977.tb01908.x]
Kuhnl, P., Langanke, U., Spielmann, W., Neubauer, M. Investigations on the polymorphism of sperm diaphorase in man--evidence for a third common allele, SD(3). Hum. Genet. 40: 79-86, 1977. [PubMed: 604247] [Full Text: https://doi.org/10.1007/BF00280833]
Pawlowski, R. A new electrophoretically distinguishable variant of human diaphorase locus 3 (DIA3): DIA3 6-1. Hum. Genet. 84: 213 only, 1990. [PubMed: 2298459] [Full Text: https://doi.org/10.1007/BF00208946]
Roychoudhury, A. K., Nei, M. Human Polymorphic Genes: World Distribution. New York: Oxford Univ. Press (pub.) 1988.
Sebetan, I. M., Akaishi, S., Matsumoto, H., Toyomasu, T. Genetic variants of the human diaphorase DIA3 in Japanese: report of a new rare allele, DIA3(4). Jpn. J. Hum. Genet. 27: 313-318, 1982.
Sebetan, I. M., Kudo, T. A new allele at the human diaphorase DIA3 locus: DIA3(5). Hum. Genet. 72: 354-355, 1986. [PubMed: 3754538] [Full Text: https://doi.org/10.1007/BF00290965]