Rtt105 regulates RPA function by configurationally stapling the flexible domains

S Kuppa, J Deveryshetty, R Chadda, JR Mattice… - Nature …, 2022 - nature.com
Abstract Replication Protein A (RPA) is a heterotrimeric complex that binds to single-
stranded DNA (ssDNA) and recruits over three dozen RPA-interacting proteins to coordinate …

Human HELB is a processive motor protein that catalyzes RPA clearance from single-stranded DNA

S Hormeno, OJ Wilkinson… - Proceedings of the …, 2022 - National Acad Sciences
Human DNA helicase B (HELB) is a poorly characterized helicase suggested to play both
positive and negative regulatory roles in DNA replication and recombination. In this work, we …

[HTML][HTML] Rapid long-distance migration of RPA on single stranded DNA occurs through intersegmental transfer utilizing multivalent interactions

S Pangeni, G Biswas, V Kaushik, S Kuppa… - Journal of Molecular …, 2024 - Elsevier
Abstract Replication Protein A (RPA) is a single stranded DNA (ssDNA) binding protein that
coordinates diverse DNA metabolic processes including DNA replication, repair, and …

An Aurora B-RPA signaling axis secures chromosome segregation fidelity

P Roshan, S Kuppa, JR Mattice, V Kaushik… - Nature …, 2023 - nature.com
Errors in chromosome segregation underlie genomic instability associated with cancers.
Resolution of replication and recombination intermediates and protection of vulnerable …

Fluorescent human RPA to track assembly dynamics on DNA

V Kaushik, R Chadda, S Kuppa, N Pokhrel, A Vayyeti… - Methods, 2024 - Elsevier
DNA metabolic processes including replication, repair, recombination, and telomere
maintenance occur on single-stranded DNA (ssDNA). In each of these complex processes …

Long DNA constructs to study helicases and nucleic acid translocases using optical tweezers

C Aicart-Ramos, S Hormeno, OJ Wilkinson… - Methods in …, 2022 - Elsevier
Single molecule biophysics experiments for the study of DNA-protein interactions usually
require production of a homogeneous population of long DNA molecules with controlled …

Generation of site-specifically labelled fluorescent human XPA to investigate DNA binding dynamics during nucleotide excision repair

S Kuppa, E Corless, CC Caldwell, M Spies, E Antony - Methods, 2024 - Elsevier
Nucleotide excision repair (NER) promotes genomic integrity by removing bulky DNA
adducts introduced by external factors such as ultraviolet light. Defects in NER enzymes are …

Site-specific labeling of SBDS to monitor interactions with the 60S ribosomal subunit

A Biswas, YF Peng, V Kaushik, S Origanti - Methods, 2023 - Elsevier
Abstract The Shwachman-Diamond syndrome (SDS) is a rare inherited ribosomopathy that
is predominantly caused by mutations in the Shwachman-Bodian-Diamond Syndrome gene …

Rad52 sorts and stacks Rad51 at the DNA junction to promote homologous recombination

J Deveryshetty, A Mistry, S Pangeni, M Ghoneim… - bioRxiv, 2024 - biorxiv.org
Homologous recombination (HR) repairs double-stranded DNA breaks (DSBs). The DSBs
are resected to yield single-stranded DNA (ssDNA) that are coated by Replication Protein A …

Rtt105 configurationally staples RPA and blocks facilitated exchange and interactions with RPA-interacting proteins

S Kuppa, J Deveryshetty, R Chadda, J Mattice… - bioRxiv, 2022 - biorxiv.org
Abstract Replication Protein A (RPA) binds to single-stranded DNA (ssDNA) and recruits
over three dozen RPA-interacting proteins (RIPs) to coordinate multiple aspects of DNA …