RT Journal Article SR Electronic T1 CpG-creating Mutations are Costly in Many Human Viruses JF bioRxiv FD Cold Spring Harbor Laboratory SP 702175 DO 10.1101/702175 A1 Victoria R. Caudill A1 Sarina Qin A1 Ryan Winstead A1 Jasmeen Kaur A1 Kaho Tisthammer A1 E. Geo Pineda A1 Oana Carja A1 Rosalind M Eggo A1 Katia Koelle A1 Katrina Lythgoe A1 Scott Roy A1 Nicole Allen A1 Milo Aviles A1 Brittany A. Baker A1 William Bauer A1 Shannel Bermudez A1 Corey Carlson A1 Francisca L. Catalan A1 Angeline Katia Chemel A1 Dwayne Evans A1 Natalie Fiutek A1 Emily Fryer A1 Samuel Melvin Goodfellow A1 Mordecai Hecht A1 Kellen Hopp A1 E. Deshawn Hopson, Jr A1 Amirhossein Jaberi A1 Christen Kinney A1 Derek Lao A1 Adrienne Le A1 Jacky Lo A1 Alejandro G. Lopez A1 Andrea López A1 Fernando G Lorenzo A1 Gordon T Luu A1 Andrew R Mahoney A1 Rebecca L. Melton A1 Gabriela Do Nascimento A1 Anjani Pradhananga A1 Nicole S. Rodrigues A1 Annie Shieh A1 Jasmine Sims A1 Rima Singh A1 Hasan Sulaeman A1 Ricky Thu A1 Krystal Tran A1 Livia Tran A1 Elizabeth J. Winters A1 Albert Wong A1 Pleuni S. Pennings YR 2019 UL http://biorxiv.org/content/early/2019/07/25/702175.abstract AB Mutations can occur throughout the virus genome and may be beneficial or deleterious. We are interested in mutations that yield a C next to a G, producing CpG sites. CpG sites are rare in eukaryotic and viral genomes. For the eukaryotes, it is thought that CpG sites are rare because they are prone to mutation when methylated. In viruses, we know less about why CpG sites are rare. A previous study in HIV suggested that CpG-creating transition mutations are more costly that similar non-CpG-creating mutations. To determine if this is the case in other viruses, we analyzed the allele frequencies of CpG-creating and non-CpG-creating mutations across various strains, subtypes, and genes of viruses using existing data obtained from Genbank, HIV Databases, and Virus Pathogen Resource. Our results suggest that CpG sites are costly for most viruses. By understanding the cost of CpG sites, we can obtain further insights into the evolution and adaptation of viruses.