{"entity": "researcher", "timestamp": "2026-07-20T22:21:33.238Z", "family": "Zikrin", "given": "Spartak", "initials": "S", "orcid": "0000-0002-7802-8869", "affiliations": ["Science for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden."], "links": {"self": {"href": "https://publications.scilifelab.se/researcher/8a82f27ea7bf43deaded33d359270820.json"}, "display": {"href": "https://publications.scilifelab.se/researcher/8a82f27ea7bf43deaded33d359270820"}}, "publications": [{"entity": "publication", "iuid": "87a87989503945b7842ab3f695a22318", "links": {"self": {"href": "https://publications.scilifelab.se/publication/87a87989503945b7842ab3f695a22318.json"}, "display": {"href": "https://publications.scilifelab.se/publication/87a87989503945b7842ab3f695a22318"}}, "title": "Pooled optical screening in bacteria using chromosomally expressed barcodes.", "authors": [{"family": "Soares", "given": "Ruben R G", "initials": "RRG", "orcid": "0000-0001-5958-5232", "researcher": {"href": "https://publications.scilifelab.se/researcher/88ea8e0d81284c35a271f05187289390.json"}}, {"family": "Garc\u00eda-Soriano", "given": "Daniela A", "initials": "DA", "orcid": "0000-0003-2849-8528", "researcher": {"href": "https://publications.scilifelab.se/researcher/2aeeed6de99647a1878352e0da2220af.json"}}, {"family": "Larsson", "given": "Jimmy", "initials": "J"}, {"family": "Fange", "given": "David", "initials": "D", "orcid": "0009-0006-3981-7618", "researcher": {"href": "https://publications.scilifelab.se/researcher/195ab3e1f94e4ad39b4aa32da6b3e217.json"}}, {"family": "Schirman", "given": "Dvir", "initials": "D", "orcid": "0000-0001-5175-0176", "researcher": {"href": "https://publications.scilifelab.se/researcher/02550d8122ed486fb67691b456926aed.json"}}, {"family": "Grillo", "given": "Marco", "initials": "M", "orcid": "0000-0003-2155-0645", "researcher": {"href": "https://publications.scilifelab.se/researcher/bcd8bec6567444558acbcbd1b3d28f7a.json"}}, {"family": "Kn\u00f6ppel", "given": "Anna", "initials": "A"}, {"family": "Sen", "given": "Beer Chakra", "initials": "BC"}, {"family": "Svahn", "given": "Fabian", "initials": "F", "orcid": "0000-0002-5914-520X", "researcher": {"href": "https://publications.scilifelab.se/researcher/3f015b5855854d40b853c17a31d3d632.json"}}, {"family": "Zikrin", "given": "Spartak", "initials": "S", "orcid": "0000-0002-7802-8869", "researcher": {"href": "https://publications.scilifelab.se/researcher/8a82f27ea7bf43deaded33d359270820.json"}}, {"family": "Ratz", "given": "Michael", "initials": "M", "orcid": "0000-0002-9795-8033", "researcher": {"href": "https://publications.scilifelab.se/researcher/a481899ca58a467499f56af4feb5457c.json"}}, {"family": "Nilsson", "given": "Mats", "initials": "M", "orcid": "0000-0001-9985-0387", "researcher": {"href": "https://publications.scilifelab.se/researcher/197cf8ba83ba430f9712b2f4d94dc3e5.json"}}, {"family": "Elf", "given": "Johan", "initials": "J", "orcid": "0000-0001-5522-1810", "researcher": {"href": "https://publications.scilifelab.se/researcher/e8c05ef8453040a794cb9c716f0ef8d6.json"}}], "type": "journal article", "published": "2025-06-03", "journal": {"title": "Commun Biol", "issn": "2399-3642", "volume": "8", "issue": "1", "pages": "851", "issn-l": "2399-3642"}, "abstract": "Optical pooled screening is an important tool to study dynamic phenotypes for libraries of genetically engineered cells. However, the desired engineering often requires that the barcodes used for in situ genotyping are expressed from the chromosome. This has not previously been achieved in bacteria. Here we describe a method for in situ genotyping of libraries with genomic barcodes in Escherichia coli. The method is applied to measure the intracellular maturation time of 84 red fluorescent proteins.", "doi": "10.1038/s42003-025-08268-5", "pmid": "40461651", "labels": {"Bioinformatics Support for Computational Resources": "Service"}, "xrefs": [{"db": "pmc", "key": "PMC12134211"}, {"db": "pii", "key": "10.1038/s42003-025-08268-5"}], "notes": [], "created": "2025-11-28T10:47:35.410Z", "modified": "2025-11-28T10:47:35.689Z"}, {"entity": "publication", "iuid": "683be6a6a7cd4499a0b9a0d985a05de7", "links": {"self": {"href": "https://publications.scilifelab.se/publication/683be6a6a7cd4499a0b9a0d985a05de7.json"}, "display": {"href": "https://publications.scilifelab.se/publication/683be6a6a7cd4499a0b9a0d985a05de7"}}, "title": "Anti-correlation of LacI association and dissociation rates observed in living cells.", "authors": [{"family": "Kandavalli", "given": "Vinodh", "initials": "V", "orcid": "0000-0001-9093-156X", "researcher": {"href": "https://publications.scilifelab.se/researcher/d9d49615bb4748ebb37f589af26b5489.json"}}, {"family": "Zikrin", "given": "Spartak", "initials": "S", "orcid": "0000-0002-7802-8869", "researcher": {"href": "https://publications.scilifelab.se/researcher/8a82f27ea7bf43deaded33d359270820.json"}}, {"family": "Elf", "given": "Johan", "initials": "J", "orcid": "0000-0001-5522-1810", "researcher": {"href": "https://publications.scilifelab.se/researcher/e8c05ef8453040a794cb9c716f0ef8d6.json"}}, {"family": "Jones", "given": "Daniel", "initials": "D", "orcid": "0000-0002-7902-996X", "researcher": {"href": "https://publications.scilifelab.se/researcher/bd395b3f8ea147a38d72f7ae3ad74b06.json"}}], "type": "journal article", "published": "2025-01-17", "journal": {"title": "Nat Commun", "issn": "2041-1723", "volume": "16", "issue": "1", "pages": "764", "issn-l": "2041-1723"}, "abstract": "The rate at which transcription factors (TFs) bind their cognate sites has long been assumed to be limited by diffusion, and thus independent of binding site sequence. Here, we systematically test this assumption using cell-to-cell variability in gene expression as a window into the in vivo association and dissociation kinetics of the model transcription factor LacI. Using a stochastic model of the relationship between gene expression variability and binding kinetics, we performed single-cell gene expression measurements to infer association and dissociation rates for a set of 35 different LacI binding sites. We found that both association and dissociation rates differed significantly between binding sites, and moreover observed a clear anticorrelation between these rates across varying binding site strengths. These results contradict the long-standing hypothesis that TF binding site strength is primarily dictated by the dissociation rate, but may confer the evolutionary advantage that TFs do not get stuck in near-operator sequences while searching.", "doi": "10.1038/s41467-025-56053-z", "pmid": "39824877", "labels": {"Bioinformatics Support for Computational Resources": "Service"}, "xrefs": [{"db": "pmc", "key": "PMC11748676"}, {"db": "pii", "key": "10.1038/s41467-025-56053-z"}], "notes": [], "created": "2025-11-28T10:45:13.067Z", "modified": "2025-11-28T10:45:13.291Z"}]}