biostudies-literatureLee SHHHS | NIH | NIH Office of the DirectorNSF | NSF Office of the DirectorNIAID NIH HHSNIGMS NIH HHS9483-94https://www.ebi.ac.uk/biostudies/studies/S-EPMC5044833biostudies-literatureUnknown90(20)<h4>Unlabelled</h4>The UL133-138 locus present in clinical strains of human cytomegalovirus (HCMV) encodes proteins required for latency and reactivation in CD34(+) hematopoietic progenitor cells and virion maturation in endothelial cells. The encoded proteins form multiple homo- and hetero-interactions and localize within secretory membranes. One of these genes, UL136 gene, is expressed as at least five different protein isoforms with overlapping and unique functions. Here we show that another gene from this locus, the UL138 gene, also generates more than one protein isoform. A long form of UL138 (pUL138-L) initiates translation from codon 1, possesses an amino-terminal signal sequence, and is a type one integral membrane protein. Here we identify a short protein isoform (pUL138-S) initiaJournal of virologyLong and Short Isoforms of the Human Cytomegalovirus UL138 Protein Silence IE Transcription and Promote Latency.PMC5044833T32 GM008692R01 AI079059T32 AI078985AI079059AI074984R37 AI079059R01 AI074984Gelbmann CBGoodrum FLee SHRak MCaviness KKalejta RFAlbright ERLee JHfalseLong and Short Isoforms of the Human Cytomegalovirus UL138 Protein Silence IE Transcription and Promote Latency.<h4>Unlabelled</h4>The UL133-138 locus present in clinical strains of human cytomegalovirus (HCMV) encodes proteins required for latency and reactivation in CD34(+) hematopoietic progenitor cells and virion maturation in endothelial cells. The encoded proteins form multiple homo- and hetero-interactions and localize within secretory membranes. One of these genes, UL136 gene, is expressed as at least five different protein isoforms with overlapping and unique functions. Here we show that another gene from this locus, the UL138 gene, also generates more than one protein isoform. A long form of UL138 (pUL138-L) initiates translation from codon 1, possesses an amino-terminal signal sequence, and is a type one integral membrane protein. Here we identify a short protein isoform (pUL138-S) initia2016-01-01T00:00:00Z2016 Oct2025-04-18T18:37:43.801Z2019-03-27T02:25:36ZS-EPMC50448332751206910.1128/jvi.01547-1610.1128/JVI.01547-16