Folliculogenesis-specific basic helix-loop-helix, also known as factor in the germline alpha (FIGalpha) or transcription factor FIGa, is a protein that in humans is encoded by the FIGLAgene.[5][6] The FIGLA gene is a germ cell-specific transcription factor preferentially expressed in oocytes that can be found on human chromosome 2p13.3.
This gene encodes a protein that functions in postnatal oocyte-specific gene expression. The protein is a basic helix-loop-helix transcription factor that regulates multiple oocyte-specific genes, including genes involved in folliculogenesis, oocyte differentiation, and those that encode the zona pellucida.[5] FIGLA is related to the zona pellucida genes ZP1, ZP2, and ZP3.
Mutation in the FIGLA gene are associated with premature ovarian failure.[7] Premature ovarian failure is a genetic disorder that leads to hypergonadotropic ovarian failure and infertility. It is believed that premature ovarian failure in humans is caused by FIGLA haploninsuffciency, which disrupts the formation of the primordial follicles.[7][8] This was observed in FIGLA mice knockouts which had diminished follicular endowment and accelerated oocyte loss throughout their reproductive life span.[7][8] Women with mutations in their FIGLA were shown to have a form of premature ovarian failure.[7][8] As well as the failure to form primordial follicles, knockout mice also lacked zona pellucida genes Zp1, Zp2, and ZP3 expression.[8]
Suzumori N, Pangas SA, Rajkovic A (2007). "Candidate genes for premature ovarian failure". Current Medicinal Chemistry. 14 (3): 353–7. doi:10.2174/092986707779941087. PMID17305537.
van Dooren MF, Bertoli-Avellab AM, Oldenburg RA (August 2009). "Premature ovarian failure and gene polymorphisms". Current Opinion in Obstetrics and Gynecology. 21 (4): 313–7. doi:10.1097/gco.0b013e32832e0813. PMID19610175. S2CID35641655.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction