The gene for the Alzheimer-associated beta-amyloid-binding protein (ERAB) is differentially expressed in the testicular Leydig cells of the azoospermic by w/w(v) mouse.
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The gene for the Alzheimer-associated beta-amyloid-binding protein (ERAB) is differentially expressed in the testicular Leydig cells of the azoospermic by w/w(v) mouse. / Hansis, C; Jähner, D; Spiess, Andrej-Nikolai; Boettcher, K; Ivell, R.
In: EUR J BIOCHEM, Vol. 258, No. 1, 1, 1998, p. 53-60.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - The gene for the Alzheimer-associated beta-amyloid-binding protein (ERAB) is differentially expressed in the testicular Leydig cells of the azoospermic by w/w(v) mouse.
AU - Hansis, C
AU - Jähner, D
AU - Spiess, Andrej-Nikolai
AU - Boettcher, K
AU - Ivell, R
PY - 1998
Y1 - 1998
N2 - In order to discover possible new testicular paracrine factors involved in the establishment of spermatogenesis, a modified differential display reverse transcription, polymerase chain reaction (DDRT-PCR) procedure was used to detect gene transcripts preferentially expressed in the testes of the azoospermic w/w(v) mutant mouse. One of the differentially expressed gene products showed partial similarity to members of the short-chain alcohol dehydrogenase family of enzymes. This cDNA fragment was used to obtain the full-length mouse cDNA sequence, which initially showed moderate similarity to a 20beta-steroid dehydrogenase from lower organisms, and later shown to have >85% similarity to a novel endoplasmic-reticulum-associated-binding protein (ERAB) from the human brain, implicated in Alzheimer's disease. A recently cloned bovine sequence also of high similarity suggests that this molecule might also represent an isozyme of 3-hydroxyacyl-CoA dehydrogenase. Using the mouse cDNA as probe, northern hybridization showed enrichment of the transcript to the testicular Leydig cells, and showed a specific approximately 20-fold enrichment in the azoospermic mouse testis. The level of the testicular ERAB transcript does not seem to change through puberty, suggesting that a lack of germ cells alone is not responsible for the up-regulation in the w/w(v) testis. Using the three-dimensional coordinates of the published 20beta-hydroxysteroid dehydrogenase structure as template, it was additionally possible to construct a molecular model of the novel protein which showed it to have a very similar structure to this enzyme, including the substrate-binding domain.
AB - In order to discover possible new testicular paracrine factors involved in the establishment of spermatogenesis, a modified differential display reverse transcription, polymerase chain reaction (DDRT-PCR) procedure was used to detect gene transcripts preferentially expressed in the testes of the azoospermic w/w(v) mutant mouse. One of the differentially expressed gene products showed partial similarity to members of the short-chain alcohol dehydrogenase family of enzymes. This cDNA fragment was used to obtain the full-length mouse cDNA sequence, which initially showed moderate similarity to a 20beta-steroid dehydrogenase from lower organisms, and later shown to have >85% similarity to a novel endoplasmic-reticulum-associated-binding protein (ERAB) from the human brain, implicated in Alzheimer's disease. A recently cloned bovine sequence also of high similarity suggests that this molecule might also represent an isozyme of 3-hydroxyacyl-CoA dehydrogenase. Using the mouse cDNA as probe, northern hybridization showed enrichment of the transcript to the testicular Leydig cells, and showed a specific approximately 20-fold enrichment in the azoospermic mouse testis. The level of the testicular ERAB transcript does not seem to change through puberty, suggesting that a lack of germ cells alone is not responsible for the up-regulation in the w/w(v) testis. Using the three-dimensional coordinates of the published 20beta-hydroxysteroid dehydrogenase structure as template, it was additionally possible to construct a molecular model of the novel protein which showed it to have a very similar structure to this enzyme, including the substrate-binding domain.
M3 - SCORING: Zeitschriftenaufsatz
VL - 258
SP - 53
EP - 60
IS - 1
M1 - 1
ER -