Aspartate racemase and D-aspartate in starfish; possible involvement in testicular maturation
Aspartate racemase and D-aspartate in starfish; possible involvement in testicular maturation
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海星中的天冬氨酸消旋酶和 D-天冬氨酸；
DOI：
10.1080/09168451.2019.1660614
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Kera Yoshio
中科院分区：
文献类型：
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作者：
Shibata Kimihiko;Sugaya Noriko;Kuboki Yuko;Matsuda Hiroko;Abe Katsumasa;Takahashi Shouji;Kera Yoshio
在几种海星的组织中检测到d-天冬氨酸、天冬氨酸消旋酶和d-天冬氨酸氧化酶的活性。天门冬氨酸消旋酶活性在雄性睾丸ofPatiria pectinifera显着升高，在夏季的繁殖季节相比，春季。我们还比较了天冬氨酸消旋酶活性与性腺指数，发现性腺指数≥6%的个体的活性是性腺指数<6%的个体的4倍。在性腺指数<6%的睾丸中，D型天冬氨酸与总天冬氨酸的比例约为25%，在性腺指数≥ 6%的睾丸中，这一比例增加至约40%。然而，在雌性卵巢中未观察到这种变化。d-天门冬氨酸对雄性海星的管理引起睾丸生长。这些结果表明天冬氨酸消旋酶和d-天冬氨酸可能参与棘皮海星睾丸成熟。
d-Aspartate, aspartate racemase activity, andd-aspartate oxidase activity were detected in tissues from several types of starfish. Aspartate racemase activity in male testes ofPatiria pectiniferawas significantly elevated in the summer months of the breeding season compared with spring months. We also compared aspartate racemase activity with the gonad index and found that activity in individuals with a gonad index ≥6% was four-fold higher than that of individuals with a gonad index <6%. The ratio of the D-form of aspartate to total aspartate was approximately 25% in testes with a gonad index <6% and this increased to approximately 40% in testes with a gonad index ≥6%. However, such changes were not observed in female ovaries. Administration ofd-aspartate into male starfish caused testicular growth. These results indicate the possible involvement of aspartate racemase andd-aspartate in testicular maturation in echinoderm starfish.