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Alex Sigal
Researcher at University of KwaZulu-Natal
Publications - 105
Citations - 13366
Alex Sigal is an academic researcher from University of KwaZulu-Natal. The author has contributed to research in topics: Medicine & Virus. The author has an hindex of 25, co-authored 68 publications receiving 7860 citations. Previous affiliations of Alex Sigal include California Institute of Technology & University College London.
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Journal ArticleDOI
Detection of a SARS-CoV-2 variant of concern in South Africa.
Houriiyah Tegally,Eduan Wilkinson,Marta Giovanetti,Marta Giovanetti,Arash Iranzadeh,Vagner Fonseca,Vagner Fonseca,Jennifer Giandhari,Deelan Doolabh,Sureshnee Pillay,Emmanuel James San,Nokukhanya Msomi,Koleka Mlisana,Anne von Gottberg,Sibongile Walaza,Mushal Allam,Arshad Ismail,Thabo Mohale,Allison J. Glass,Susan Engelbrecht,Gert U. van Zyl,Wolfgang Preiser,Francesco Petruccione,Alex Sigal,Alex Sigal,Diana Hardie,Gert Marais,Nei yuan Hsiao,Stephen N.J. Korsman,Mary-Ann Davies,Lynn Tyers,Innocent Mudau,Denis York,Caroline Maslo,Dominique Goedhals,Shareef Abrahams,Oluwakemi Laguda-Akingba,Arghavan Alisoltani-Dehkordi,Arghavan Alisoltani-Dehkordi,Adam Godzik,Constantinos Kurt Wibmer,B.T. Sewell,José Lourenço,Luiz Carlos Junior Alcantara,Luiz Carlos Junior Alcantara,Sergei L Kosakovsky Pond,Steven Weaver,Darren P. Martin,Richard J Lessells,Richard J Lessells,Jinal N. Bhiman,Carolyn Williamson,Carolyn Williamson,Tulio de Oliveira,Tulio de Oliveira,Tulio de Oliveira +55 more
TL;DR: A newly arisen lineage of SARS-CoV-2 (designated 501Y.V2) was identified in South Africa after the first wave of the epidemic in a severely affected metropolitan area (Nelson Mandela Bay) that is located on the coast of the Eastern Cape province.
Journal ArticleDOI
Multiple SARS-CoV-2 variants escape neutralization by vaccine-induced humoral immunity.
Wilfredo F. Garcia-Beltran,Wilfredo F. Garcia-Beltran,Evan C. Lam,Kerri St. Denis,Adam Nitido,Zeidy H. Garcia,Blake M. Hauser,Jared Feldman,Maia N. Pavlovic,David Gregory,Mark C. Poznansky,Alex Sigal,Alex Sigal,Aaron G. Schmidt,A. John Iafrate,Vivek Naranbhai,Vivek Naranbhai,Alejandro B. Balazs +17 more
TL;DR: In this article, the authors evaluated the neutralization potency of 99 individuals that received one or two doses of either BNT162b2 or mRNA-1273 vaccines against pseudoviruses representing 10 globally circulating strains of SARS-CoV-2.
Journal ArticleDOI
Dynamics of the p53-Mdm2 feedback loop in individual cells
Galit Lahav,Nitzan Rosenfeld,Alex Sigal,Naama Geva-Zatorsky,Arnold J. Levine,Michael B. Elowitz,Uri Alon +6 more
TL;DR: It is found that p53 was expressed in a series of discrete pulses after DNA damage, and it is suggested that the p53-Mdm2 feedback loop generates a 'digital' clock that releases well-timed quanta of p53 until damage is repaired or the cell dies.
Posted ContentDOI
Emergence and rapid spread of a new severe acute respiratory syndrome-related coronavirus 2 (SARS-CoV-2) lineage with multiple spike mutations in South Africa
Houriiyah Tegally,Eduan Wilkinson,Marta Giovanetti,Marta Giovanetti,Arash Iranzadeh,Vagner Fonseca,Vagner Fonseca,Jennifer Giandhari,Deelan Doolabh,Sureshnee Pillay,Emmanuel James San,Nokukhanya Msomi,Koleka Mlisana,Koleka Mlisana,Anne von Gottberg,Anne von Gottberg,Sibongile Walaza,Sibongile Walaza,Mushal Allam,Arshad Ismail,Thabo Mohale,Allison J. Glass,Susan Engelbrecht,Gert U. van Zyl,Wolfgang Preiser,Francesco Petruccione,Alex Sigal,Alex Sigal,Diana Hardie,Gert Marais,Marvin Hsiao,Stephen N.J. Korsman,Mary-Ann Davies,Lynn Tyers,Innocent Mudau,Denis York,Caroline Maslo,Dominique Goedhals,Shareef Abrahams,Oluwakemi Laguda-Akingba,Oluwakemi Laguda-Akingba,Arghavan Alisoltani-Dehkordi,Arghavan Alisoltani-Dehkordi,Adam Godzik,Constantinos Kurt Wibmer,B.T. Sewell,José Lourenço,Luiz Carlos Junior Alcantara,Luiz Carlos Junior Alcantara,Sergei L Kosakovsky Pond,Steven Weaver,Darren P. Martin,Richard J Lessells,Richard J Lessells,Jinal N. Bhiman,Jinal N. Bhiman,Carolyn Williamson,Carolyn Williamson,Tulio de Oliveira,Tulio de Oliveira,Tulio de Oliveira +60 more
TL;DR: In this paper, the authors describe a new SARS-CoV-2 lineage (501Y.V2) characterised by eight lineage-defining mutations in the spike protein, including three at important residues in the receptor-binding domain (K417N, E484K and N501Y).
Journal Article
Oncogenic mutations of the p53 tumor suppressor: the demons of the guardian of the genome.
Alex Sigal,Varda Rotter +1 more
TL;DR: Understanding the structure and functions of oncogenic p53 mutants may lead to more potent reactivation modalities or to the ability to eliminate mutant p53 gain of function.