Difference between revisions of "Part:BBa K3889024"
 
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===Protein Sequence===
 
===Protein Sequence===
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RLLSAASNKWPMGGSGVVEVPFLLSSKYDEPSRQVILEALAEFERSTCIRFVTYQDQRDFISIIPMYGCFSSVGRSGGMQVVSLAPTCLQKGRGIVL<span style="color:red">HELMHVLGFWH</span> EHTRADRDRYIRVNWNEILPGFEINFIKSRSSNMLTPYDYSSVMHYGRLAFSRRGLPTITPLWAPSVHIGQRWNLSASDITRVLKLYGCS
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<html>
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<head>
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where <span style="color:red">red</span> denotes the active site [1]
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<style>
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div.scroll {overflow-x: aut0; overflow-y: hidden;}
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</style>
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</head>
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<body>
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<div class="scroll">
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<p>RLLSAASNKWPMGGSGVVEVPFLLSSKYDEPSRQVILEALAEFERSTCIRFVTYQDQRDFISIIPMYGCFSSVGRSGGMQVVSLAPTCLQKGRGIVL<span style="color:red">HELMHVLGFWH</span>EHTRADRDRYIRVNWNEILPGFEINFIKSRSSNMLTPYDYSSVMHYGRLAFSRRGLPTITPLWAPSVHIGQRWNLSASDITRVLKLYGCS</p>
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</div>
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<p>where <span style="color:red">red</span> denotes the active site [1]</p>
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</body>
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</html>
  
 
[[File:T--IISER-Tirupati India--Ovastacin.png|thumb|centre|Fig 1. Ovastacin (Active site marked in magenta)[1]]]<br>
 
[[File:T--IISER-Tirupati India--Ovastacin.png|thumb|centre|Fig 1. Ovastacin (Active site marked in magenta)[1]]]<br>

Latest revision as of 11:31, 19 October 2021


Human Ovastacin protease

The SAS1B protein or Ovastacin is a member of the astacin family of metalloproteinases. It is a binding partner in the oolemma of oocytes for the intra-acrosomal sperm protein called SLLP1 (Sperm Lysozyme-Like Protein) [1]. In the reproductive system, SAS1B translation is restricted to the tissues at the ovary and oocytes of the reproductive system. It first appears in ovarian follicles during the transition of primary-secondary follicles in the form of zymogen in humans and is released from cortical granules during the cortical reaction in an activated form after getting cleaved[1]. A part of the C-terminal domain of Ovastacin remains attached to the oolemma, while the N-terminal active Ovastacin domain is secreted [2]. The secreted active protease acts specifically on ZP2 as it is a target for cleavage [3].

Protein Sequence

RLLSAASNKWPMGGSGVVEVPFLLSSKYDEPSRQVILEALAEFERSTCIRFVTYQDQRDFISIIPMYGCFSSVGRSGGMQVVSLAPTCLQKGRGIVLHELMHVLGFWHEHTRADRDRYIRVNWNEILPGFEINFIKSRSSNMLTPYDYSSVMHYGRLAFSRRGLPTITPLWAPSVHIGQRWNLSASDITRVLKLYGCS

where red denotes the active site [1]

Fig 1. Ovastacin (Active site marked in magenta)[1]


C-score Estimated TM-score Estimated RMSD
1.83 0.97±0.05 1.8±1.5 Å

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal XhoI site found at 210
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal NgoMIV site found at 479
  • 1000
    COMPATIBLE WITH RFC[1000]


References

1. Pires, E.S., Hlavin, C., Macnamara, E., Ishola-Gbenla, K., Doerwaldt, C., Chamberlain, C., Klotz, K., Herr, A.K., Khole, A., Chertihin, O., Curnow, E., Feldman, S.H., Mandal, A., Shetty, J., Flickinger, C. and Herr, J.C. (2013), SAS1B protein [ovastacin] shows temporal and spatial restriction to oocytes in several eutherian orders and initiates translation at the primary to secondary follicle transition. Dev. Dyn., 242: 1405-1426. https://doi.org/10.1002/dvdy.24040

2. Körschgen, H., Kuske, M., Karmilin, K., Yiallouros, I., Balbach, M., Floehr, J., Wachten, D., Jahnen-Dechent, W., & Stöcker, W. (2017). Intracellular activation of ovastacin mediates pre-fertilization hardening of the zona pellucida. Molecular human reproduction, 23(9), 607–616. https://doi.org/10.1093/molehr/gax040

3. Anna D. Burkart, Bo Xiong, Boris Baibakov, Maria Jiménez-Movilla, Jurrien Dean; Ovastacin, a cortical granule protease, cleaves ZP2 in the zona pellucida to prevent polyspermy. J Cell Biol 2 April 2012; 197 (1): 37–44. doi: https://doi.org/10.1083/jcb.201112094