Jianxiong Xiao, PhD
Associate Research ScientistAbout
Research
Publications
2024
The Role of RAG in V(D)J Recombination
Xiao J, Martin E, Wang K, Schatz D. The Role of RAG in V(D)J Recombination. 2024 DOI: 10.1016/b978-0-128-24465-4.00019-3.Peer-Reviewed Original ResearchRecombination signal sequencesRecombination activating geneV(D)J recombinationDNA cleavageConserved sequence elementsNonhomologous end-joining pathwayLymphoid-specific proteinsAntigen receptor gene segmentsEnd-joining pathwayPair of hairpinsReceptor gene segmentsTransposable elementsDomain architectureSequence elementsLocus structureSignal sequenceTransposition mechanismTranscriptional regulationJawed vertebratesTransposase activityActive genesPosttranslational modificationsEnhancer elementsProtein structureCell cycleChapter 2 The Mechanism, Regulation and Evolution of V(D)J Recombination
Schatz D, Zhang Y, Xiao J, Zha S, Zhang Y, Alt F. Chapter 2 The Mechanism, Regulation and Evolution of V(D)J Recombination. 2024, 13-57. DOI: 10.1016/b978-0-323-95895-0.00004-0.Peer-Reviewed Original ResearchAntigen receptor lociNon-homologous end joiningChromatin loop extrusionRecombination-activating geneLoop extrusionV(D)J recombinationRecombination-activating gene proteinV(D)J recombination reactionReceptor locusEnd joiningDouble-strand (ds) DNA breaksLoop extrusion mechanismRegulation of recombinationRepertoire of antigen receptorsLymphocyte developmentOncogenic chromosomal translocationsVariable region gene segmentsDNA repair proteinsDNA repair pathwaysChromatin accessibilityDNA segmentsV(D)J recombinase activitySubstrate DNALoop domainV(D)J junctions
2023
Insights into RAG Evolution from the Identification of “Missing Link” Family A RAGL Transposons
Martin E, Le Targa L, Tsakou-Ngouafo L, Fan T, Lin C, Xiao J, Huang Z, Yuan S, Xu A, Su Y, Petrescu A, Pontarotti P, Schatz D. Insights into RAG Evolution from the Identification of “Missing Link” Family A RAGL Transposons. Molecular Biology And Evolution 2023, 40: msad232. PMID: 37850912, PMCID: PMC10629977, DOI: 10.1093/molbev/msad232.Peer-Reviewed Original ResearchConceptsJawed vertebratesTransposon familyRAG1-RAG2 recombinaseRecombination signal sequencesHemichordate Ptychodera flavaMolecular domesticationSignal sequenceP. flavaDNA bindingPtychodera flavaSequence featuresTransposition activityVertebratesTransposonCritical enzymeHinge regionGenomeDomesticationFlavaProteinPivotal stepAdaptive immunityCritical intermediateRAGRAGL
2022
Tumor suppressor CEBPA interacts with and inhibits DNMT3A activity
Chen X, Zhou W, Song R, Liu S, Wang S, Chen Y, Gao C, He C, Xiao J, Zhang L, Wang T, Liu P, Duan K, Cheng Z, Zhang C, Zhang J, Sun Y, Jackson F, Lan F, Liu Y, Xu Y, Wong J, Wang P, Yang H, Xiong Y, Chen T, Li Y, Ye D. Tumor suppressor CEBPA interacts with and inhibits DNMT3A activity. Science Advances 2022, 8: eabl5220. PMID: 35080973, PMCID: PMC8791617, DOI: 10.1126/sciadv.abl5220.Peer-Reviewed Original ResearchDNA methyltransferasesDNA methylationDe novo DNA methylationMammalian embryonic developmentNovo DNA methylationPRC2 target genesLonger splice isoformsCCAAT/enhancer binding protein αAberrant DNA methylationEnhancer binding protein αDNMT3A activityDNMT3a isoformsDNA substratesEmbryonic developmentSpecific lociTarget genesSplice isoformsDNA-hypomethylating agentN-terminusShort isoformProtein αMethylationFunctional differencesIsoformsMutations
2021
The RAG1 N-terminal region regulates the efficiency and pathways of synapsis for V(D)J recombination
Beilinson HA, Glynn RA, Yadavalli AD, Xiao J, Corbett E, Saribasak H, Arya R, Miot C, Bhattacharyya A, Jones JM, Pongubala JMR, Bassing CH, Schatz DG. The RAG1 N-terminal region regulates the efficiency and pathways of synapsis for V(D)J recombination. Journal Of Experimental Medicine 2021, 218: e20210250. PMID: 34402853, PMCID: PMC8374863, DOI: 10.1084/jem.20210250.Peer-Reviewed Original ResearchThe activation mechanisms of master kinases in the DNA damage response
Xiao J, Rao Q, Xu Y. The activation mechanisms of master kinases in the DNA damage response. Genome Instability & Disease 2021, 2: 211-224. DOI: 10.1007/s42764-021-00045-y.Peer-Reviewed Original ResearchDNA damage responsePIKK regulatory domainDNA-PKDamage responseMultiple DNA repair pathwaysDNA damageStructures of ATMCryo-electron microscopyDNA repair pathwaysSeries of proteinsKinase structureMaster kinaseRegulatory domainRepair pathwaysGenetic informationCritical kinaseMolecular mechanismsSophisticated mechanismsExtrinsic stimuliActivation mechanismKinaseCritical roleATRPathwayEukaryotes
2019
Structural insights into the activation of ATM kinase
Xiao J, Liu M, Qi Y, Chaban Y, Gao C, Pan B, Tian Y, Yu Z, Li J, Zhang P, Xu Y. Structural insights into the activation of ATM kinase. Cell Research 2019, 29: 683-685. PMID: 31320732, PMCID: PMC6796860, DOI: 10.1038/s41422-019-0205-0.Peer-Reviewed Original Research
2014
Structural insight into autoinhibition and histone H3-induced activation of DNMT3A
Guo X, Wang L, Li J, Ding Z, Xiao J, Yin X, He S, Shi P, Dong L, Li G, Tian C, Wang J, Cong Y, Xu Y. Structural insight into autoinhibition and histone H3-induced activation of DNMT3A. Nature 2014, 517: 640-644. PMID: 25383530, DOI: 10.1038/nature13899.Peer-Reviewed Original Research
2012
Structural Insight into Coordinated Recognition of Trimethylated Histone H3 Lysine 9 (H3K9me3) by the Plant Homeodomain (PHD) and Tandem Tudor Domain (TTD) of UHRF1 (Ubiquitin-like, Containing PHD and RING Finger Domains, 1) Protein*
Cheng J, Yang Y, Fang J, Xiao J, Zhu T, Chen F, Wang P, Li Z, Yang H, Xu Y. Structural Insight into Coordinated Recognition of Trimethylated Histone H3 Lysine 9 (H3K9me3) by the Plant Homeodomain (PHD) and Tandem Tudor Domain (TTD) of UHRF1 (Ubiquitin-like, Containing PHD and RING Finger Domains, 1) Protein*. Journal Of Biological Chemistry 2012, 288: 1329-1339. PMID: 23161542, PMCID: PMC3543016, DOI: 10.1074/jbc.m112.415398.Peer-Reviewed Original ResearchConceptsTandem Tudor domainHistone H3 lysine 9Plant homeodomainH3 lysine 9Tudor domainHistone methylationLysine 9DNA methylationStructural insightsDNA replication forksCoordinated recognitionImportant epigenetic regulatorsUnmodified histone H3Unmodified H3UHRF1 proteinReplication forksHistone H3Epigenetic regulatorsLys-9Autoubiquitination activityLys-4H3K9me3UHRF1Linker regionBiochemical experiments