Meghan McLean Poon, Ph.D.
Palo Alto, California, United States
2K followers
500+ connections
About
I focus on patent preparation and prosecution, portfolio strategy, and IP due diligence…
Activity
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'Twas the day before Thanksgiving, and all through the halls, Not a patent agent was stirring - there were no client calls. The claims were all…
'Twas the day before Thanksgiving, and all through the halls, Not a patent agent was stirring - there were no client calls. The claims were all…
Posted by Meghan McLean Poon, Ph.D.
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This #Thanksgiving, we are filled with gratitude for those around us as we gathered around for a holiday lunch. To our dedicated team, our partners…
This #Thanksgiving, we are filled with gratitude for those around us as we gathered around for a holiday lunch. To our dedicated team, our partners…
Liked by Meghan McLean Poon, Ph.D.
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Next-Gen ADCs Driving ‘Renaissance’ in Already Hot Oncology Drug Class ADC Therapeutics, Sutro Biopharma and Zai Lab are among those developing…
Next-Gen ADCs Driving ‘Renaissance’ in Already Hot Oncology Drug Class ADC Therapeutics, Sutro Biopharma and Zai Lab are among those developing…
Liked by Meghan McLean Poon, Ph.D.
Experience
Education
Volunteer Experience
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Participant
Team in Training
- 6 months
Health
Raised money to benefit the Leukemia and Lymphoma Society and ran the Los Angeles Marathon.
Publications
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Multiple interfaces between a serine recombinase and an enhancer control site-specific DNA inversion
E. Life
Serine recombinases are often tightly controlled by elaborate, topologically-defined, nucleoprotein complexes. Hin is a member of the DNA invertase subclass of serine recombinases that are regulated by a remote recombinational enhancer element containing two binding sites for the protein Fis. Two Hin dimers bound to specific recombination sites associate with the Fis-bound enhancer by DNA looping where they are remodeled into a synaptic tetramer competent for DNA chemistry and exchange. Here we…
Serine recombinases are often tightly controlled by elaborate, topologically-defined, nucleoprotein complexes. Hin is a member of the DNA invertase subclass of serine recombinases that are regulated by a remote recombinational enhancer element containing two binding sites for the protein Fis. Two Hin dimers bound to specific recombination sites associate with the Fis-bound enhancer by DNA looping where they are remodeled into a synaptic tetramer competent for DNA chemistry and exchange. Here we show that the flexible beta-hairpin arms of the Fis dimers contact the DNA binding domain of one subunit of each Hin dimer. These contacts sandwich the Hin dimers to promote remodeling into the tetramer. A basic region on the Hin catalytic domain then contacts enhancer DNA to complete assembly of the active Hin tetramer. Our results reveal how the enhancer generates the recombination complex that specifies DNA inversion and regulates DNA exchange by the subunit rotation mechanism. - See more at: http://elifesciences.org/content/2/e01211#sthash.IR8sl6Mn.dpuf
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Recombining DNA by protein swivels
Structure Journal
Two new reports on serine recombinases, one of a crystal snapshot in an alternate rotational conformer poised for DNA cleavage (Keenholtz et al., 2011), and a second employing single-DNA molecule approaches (Bai et al., 2011), provide strong support for the subunit rotation model for exchanging DNA strands
Other authors -
The Hin recombinase assembles a tetrameric protein swivel that exchanges DNA strands
Nucleic Acids Research
Most site-specific recombinases can be grouped into two structurally and mechanistically different classes. Whereas recombination by tyrosine recombinases proceeds with little movements by the proteins, serine recombinases exchange DNA strands by a mechanism requiring large quaternary rearrangements. Here we use site-directed crosslinking to investigate the conformational changes that accompany the formation of the synaptic complex and the exchange of DNA strands by the Hin serine recombinase…
Most site-specific recombinases can be grouped into two structurally and mechanistically different classes. Whereas recombination by tyrosine recombinases proceeds with little movements by the proteins, serine recombinases exchange DNA strands by a mechanism requiring large quaternary rearrangements. Here we use site-directed crosslinking to investigate the conformational changes that accompany the formation of the synaptic complex and the exchange of DNA strands by the Hin serine recombinase. Efficient crosslinking between residues corresponding to the 'D-helix' region provides the first experimental evidence for interactions between synapsed subunits within this region and distinguishes between different tetrameric conformers that have been observed in crystal structures of related serine recombinases. Crosslinking profiles between cysteines introduced over the 35 residue E-helix region that constitutes most of the proposed rotating interface both support the long helical structure of the region and provide strong experimental support for a subunit rotation mechanism that mediates DNA exchange.
Other authors
More activity by Meghan
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Proud wifey alert! My brilliant and talented husband Christian Douglas has published a new book, The Food Forward Garden: A Complete Guide to…
Proud wifey alert! My brilliant and talented husband Christian Douglas has published a new book, The Food Forward Garden: A Complete Guide to…
Liked by Meghan McLean Poon, Ph.D.
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From carbon dioxide to starch—no plants required. In Science, researchers developed a cell-free method of synthesizing starch from CO2 and hydrogen…
From carbon dioxide to starch—no plants required. In Science, researchers developed a cell-free method of synthesizing starch from CO2 and hydrogen…
Liked by Meghan McLean Poon, Ph.D.
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"And we shall cite these opinions based on what page they appear in books that report them." "Ah, so we will have vast libraries where anyone may…
"And we shall cite these opinions based on what page they appear in books that report them." "Ah, so we will have vast libraries where anyone may…
Liked by Meghan McLean Poon, Ph.D.
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At Caribou, our mission is to develop innovative, transformative therapies for patients with devastating diseases through novel genome editing…
At Caribou, our mission is to develop innovative, transformative therapies for patients with devastating diseases through novel genome editing…
Liked by Meghan McLean Poon, Ph.D.
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Next week, I will officially start my second year as an associate in the MOFO patent group! I am so grateful for my experience in the two-summer…
Next week, I will officially start my second year as an associate in the MOFO patent group! I am so grateful for my experience in the two-summer…
Liked by Meghan McLean Poon, Ph.D.
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$5.25M! Excited to be a first investor in CalmWave. Ophir Ronen 🚀 and team are helping improve emergency care, allowing doctors and nurses to focus…
$5.25M! Excited to be a first investor in CalmWave. Ophir Ronen 🚀 and team are helping improve emergency care, allowing doctors and nurses to focus…
Liked by Meghan McLean Poon, Ph.D.
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