0000000000339552

AUTHOR

Uwe Klemm

showing 2 related works from this author

Thymus-derived regulatory T cells are positively selected on natural self-antigen through cognate interactions of high functional avidity

2016

Regulatory T (Treg) cells expressing Foxp3 transcripton factor are essential for immune homeostasis. They arise in the thymus as a separate lineage from conventional CD4+Foxp3- T (Tconv) cells. Here, we show that the thymic development of Treg cells depends on the expression of their endogenous cognate self-antigen. The formation of these cells was impaired in mice lacking this self-antigen, while Tconv cell development was not negatively affected. Thymus-derived Treg cells were selected by self-antigens in a specific manner, while autoreactive Tconv cells were produced through degenerate recognition of distinct antigens. These distinct modes of development were associated with the expressi…

0301 basic medicineCell typeCancer ResearchEncephalomyelitis Autoimmune ExperimentalMultiple Sclerosis[SDV]Life Sciences [q-bio]ImmunologyReceptors Antigen T-CellEndogenyT-Cell Antigen Receptor Specificitychemical and pharmacologic phenomenaThymus GlandBiologymedicine.disease_causeAutoantigensT-Lymphocytes RegulatoryAutoimmunity03 medical and health sciencesMice0302 clinical medicineAntigenT-Lymphocyte SubsetsmedicineImmunology and AllergyAnimalsHumansAvidityCTLA-4 AntigenReceptorClonal Selection Antigen-MediatedCells CulturedMice KnockoutCell growthFOXP3Forkhead Transcription Factorshemic and immune systemsPeptide Fragments[SDV] Life Sciences [q-bio]Mice Inbred C57BL030104 developmental biologyInfectious DiseasesImmunologyMyelin-Oligodendrocyte Glycoprotein030215 immunology
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Acrosin, the peculiar sperm-specific serine protease.

1991

The sperm enzyme acrosin has long been known as one of the key enzymes in the mammalian fertilization process. Elucidation of primary structures of preproacrosin from various species have allowed a deeper insight into the structural organization and the complex evolution of the sperm proteinase acrosin. In addition to the typical elements of serine proteases, the acrosin molecule possesses one novel domain that might convey DNA-binding properties.

MaleProteasesMolecular Sequence DataSemenSerine03 medical and health sciencesGeneticsAnimalsHumansAmino Acid SequenceGenetics (clinical)030304 developmental biologyPREPROACROSINchemistry.chemical_classificationSerine protease0303 health sciencesAcrosinbiology030302 biochemistry & molecular biologyAcrosinSpermSpermatozoa3. Good healthEnzymechemistryBiochemistrybiology.proteinSequence AlignmentHuman genetics
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