Type

Journal Article

Authors

John A Hammond
Peter Parham
David E. MacHugh
Mick Watson
Andrew Warry
Farbod Babrzadeh
David A. Magee
Steven D E Park
Matthew Breen
Christina Williams
and 5 others

Subjects

Microbiology

Topics
family chromosomes mammalian human genetics receptors natural killer cell receptors kir cattle genetics human genetics and genomics immunoglobulins signal transduction metabolism telomere multigene family gene library phenotype molecular sequence data sequence analysis dna haplotypes chromosome mapping genetic loci pathogens animals point mutation cell receptors cloning molecular classification genome receptors igg evolution molecular phylogeny humans

Definition of the cattle killer cell Ig-like receptor gene family: Comparison with aurochs and human counterparts (2014)

Abstract Under selection pressure from pathogens, variable NK cell receptors that recognize polymorphic MHC class I evolved convergently in different species of placental mammal. Unexpectedly, diversified killer cell Ig–like receptors (KIRs) are shared by simian primates, including humans, and cattle, but not by other species. Whereas much is known of human KIR genetics and genomics, knowledge of cattle KIR is limited to nine cDNA sequences. To facilitate comparison of the cattle and human KIR gene families, we determined the genomic location, structure, and sequence of two cattle KIR haplotypes and defined KIR sequences of aurochs, the extinct wild ancestor of domestic cattle. Larger than its human counterpart, the cattle KIR locus evolved through successive duplications of a block containing ancestral KIR3DL and KIR3DX genes that existed before placental mammals. Comparison of two cattle KIR haplotypes and aurochs KIR show the KIR are polymorphic and the gene organization and content appear conserved. Of 18 genes, 8 are functional and 10 were inactivated by point mutation. Selective inactivation of KIR3DL and activating receptor genes leaves a functional cohort of one inhibitory KIR3DL, one activating KIR3DX, and six inhibitory KIR3DX. Functional KIR diversity evolved from KIR3DX in cattle and from KIR3DL in simian primates. Although independently evolved, cattle and human KIR gene families share important function-related properties, indicating that cattle KIR are NK cell receptors for cattle MHC class I. Combinations of KIR and MHC class I are the major genetic factors associated with human disease and merit investigation in cattle.
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Full list of authors on original publication

John A Hammond, Peter Parham, David E. MacHugh, Mick Watson, Andrew Warry, Farbod Babrzadeh, David A. Magee, Steven D E Park, Matthew Breen, Christina Williams and 5 others

Experts in our system

1
David E. MacHugh
University College Dublin
Total Publications: 82
 
2
David A. Magee
University College Dublin
Total Publications: 47