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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We’re pleased to welcome Tim Cope to the SERB team as our new US VP and Cardiology Business Unit leader. Tim brings a passion for enhancing patient…
We’re pleased to welcome Tim Cope to the SERB team as our new US VP and Cardiology Business Unit leader. Tim brings a passion for enhancing patient…
Liked by Meghan McLean Poon, Ph.D.
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AbbVie #Ventures is committed to supporting leading #biotech innovators globally. Thank you, Biopharma Dealmakers, for helping spread the word about…
AbbVie #Ventures is committed to supporting leading #biotech innovators globally. Thank you, Biopharma Dealmakers, for helping spread the word about…
Liked by Meghan McLean Poon, Ph.D.
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USPTO has released its final rule on patent fees to take effect early next year. As expected, many of the fee increases are aimed at advancing the…
USPTO has released its final rule on patent fees to take effect early next year. As expected, many of the fee increases are aimed at advancing the…
Shared 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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Maze Therapeutics has lined up new funding, nearly three years after its last disclosed financing. The $115 million Series D comes weeks after the…
Maze Therapeutics has lined up new funding, nearly three years after its last disclosed financing. The $115 million Series D comes weeks after the…
Liked by Meghan McLean Poon, Ph.D.
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One less thing to keep patent practitioners up at night: The USPTO withdrew its controversial proposed terminal disclaimer rule this week. The…
One less thing to keep patent practitioners up at night: The USPTO withdrew its controversial proposed terminal disclaimer rule this week. The…
Posted by Meghan McLean Poon, Ph.D.
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Today, nearly seven months after issuing a Notice of Proposed Rulemaking that proposed major and controversial changes to terminal disclaimer…
Today, nearly seven months after issuing a Notice of Proposed Rulemaking that proposed major and controversial changes to terminal disclaimer…
Liked by Meghan McLean Poon, Ph.D.
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Lawyers have one job. This is it: As a lawyer, you do for others. Person calls with an issue or dispute. And your job is to help them solve it…
Lawyers have one job. This is it: As a lawyer, you do for others. Person calls with an issue or dispute. And your job is to help them solve it…
Liked by Meghan McLean Poon, Ph.D.
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I was once on the launch team for a new antidepressant. I was sure it would reshape patient care. Or, for at least 1 out of 4 people - which was…
I was once on the launch team for a new antidepressant. I was sure it would reshape patient care. Or, for at least 1 out of 4 people - which was…
Liked by Meghan McLean Poon, Ph.D.
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So proud to see Avalo, Inc, from our portfolio, featured on CNN!! I first met Brendan Collins and Mariano Alvarez back in 2020, when they were still…
So proud to see Avalo, Inc, from our portfolio, featured on CNN!! I first met Brendan Collins and Mariano Alvarez back in 2020, when they were still…
Liked by Meghan McLean Poon, Ph.D.
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Learn about opportunities for patent term extension for medical devices in this update by Alayna Choo, Jon Bockman, Brigid Bondoc, and me on MoFo’s…
Learn about opportunities for patent term extension for medical devices in this update by Alayna Choo, Jon Bockman, Brigid Bondoc, and me on MoFo’s…
Liked by Meghan McLean Poon, Ph.D.
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This morning, I read a post from Bruno Giussani about the AI-ification of LinkedIn posts. Apparently, it's happening more than ever on this platform.…
This morning, I read a post from Bruno Giussani about the AI-ification of LinkedIn posts. Apparently, it's happening more than ever on this platform.…
Liked by Meghan McLean Poon, Ph.D.
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