Expression of spicule matrix proteins in the sea urchin embryo during normal and experimentally altered spiculogenesis.

Expression of spicule matrix proteins in the sea urchin embryo during normal and experimentally altered spiculogenesis.
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在正常和实验改变的针状发生过程中,海胆胚胎中针状基质蛋白的表达。

DOI:
10.1006/dbio.2000.9828
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发表时间:
2000
期刊:
Developmental biology.
影响因子:
--
通讯作者:
Wilt,FH
Wilt,FH
中科院分区:
--
文献类型:
--
作者:
Urry,LA;Hamilton,PC;Killian,CE;Wilt,FH

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在胚胎发育过程中,海胆胚胎会形成内骨骼钙化针状物。这种生物矿化的例子在实验上是可以获得的,而且还提供了在发展背景下发生的优势。在这里,我们研究了组成骨针蛋白质基质的40多种蛋白质中两种蛋白质的出现和定位的时间进程。已经对SM50和SM30进行了较详细的研究,并制备了针对它们的多克隆抗血清(C.E.Killian和F.H.Wilt,1996,J.Biol)。化学。271、9150-9159)。利用这些抗体,我们在这里描述了这两种蛋白在紫球藻中的定位和积累的时间过程,包括在完整的胚胎和微米培养中。我们还通过研究在实验操作分离的骨针过程中蛋白质定位的变化来研究基质蛋白SM50、SM30和PM27在三维针状体中的分布。根据SM50、PM27和SM30在生物矿化中的定位和表达模式,我们认为它们可能在生物矿化过程中发挥不同的作用。这些蛋白质不太可能仅仅是矿物中的结构元素。SM50和PM27可能在定义细胞外间隙中起作用,而SM30可能在毛刺成分的分泌中起作用。最后,我们报道了血清对微米培养中一些初级间充质特异性蛋白表达的影响;保留血清会严重抑制SM30的积累,但对其他蛋白的积累只有轻微的影响。
During its embryonic development, the sea urchin embryo forms an endoskeletal calcitic spicule. This instance of biomineralization is experimentally accessible and also offers the advantage of occurring within a developmental context. Here we investigate the time course of appearance and localization of two proteins among the four dozen that constitute the protein matrix of the skeletal spicule. SM50 and SM30 have been studied in some detail, and polyclonal antisera have been prepared against them (C. E. Killian and F. H. Wilt, 1996, J. Biol. Chem. 271, 9150–9159). Using these antibodies we describe here the localization and time course of accumulation of these two proteins in Strongylocentrotus purpuratus, both in the intact embryo and in micromere cultures. We also investigate the disposition of the matrix proteins, SM50, SM30, and PM27, in the three-dimensional spicule by studying changes in protein localization during experimental manipulation of isolated skeletal spicules. We conclude that SM50, PM27, and SM30 probably play different roles in biomineralization, based on their localization and patterns of expression. It is unlikely that these proteins are solely structural elements within the mineral. SM50 and PM27 may play a role in defining the extracellular space in which spicule deposition occurs, while SM30 may play a role in secretion of spicule components. Finally, we report on the effects of serum on expression of some primary mesenchyme-specific proteins in micromere cultures; withholding serum severely depresses accumulation of SM30 but has only modest effects on the accumulation of other proteins.
DOI: 10.1016/0012-1606(87)90254-5
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发表时间: 1997
期刊: Development (Cambridge, England)
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发表时间: 1999-06
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发表时间: 1995
期刊: Development
影响因子: 4.6
作者:
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通讯作者: W. Lennarz