Ψ KRT33B - Balaenoptera acutorostrata

Reference Gene:
Job_ID:
Curator:
GlossID Species Gene Loss Mechanism Loss Type Lineage Specific Evidence Accession Nr.
GL_ZDV9K5 Balaenoptera acutorostrata Gene deletion Full No Genomic & Synteny maps

Statements

Type Excerpt DOI
Functional "Hair follicle-specific keratin genes consisted of 9 hair follicle-specific epithelial keratin genes (K71-K75, K25-K28) and 17 hair keratins (K31-K40, K81-K86) expressed in hair follicle and hair which could directly affect hair growth." 10.1186/s12983-017-0225-x
Mutation Description "Nine keratin subfamilies were completely absent in cetaceans when compared to its terrestrial relative of artiodactylans, such as six type I genes (K10, K25, K27, K28, K33A, K33B) and three type II genes (K1, K73, K77)." 10.1186/s12983-017-0225-x
Methodology & Validation "We first identified α-keratin gene repertoires in the cow (Bos taurus) (coverage 7×,Btau_4.6.1) [...] taking all the known α-keratin gene sequences of human as queries using BLASTN and TBLASTN algorithm. [...] The putative α-keratin genes in the cow were then taken as queries to explore the α-keratin multigene family in the genome of 11 marine mammals, including [...] minke whale (B. acutorostrata, coverage 92×, BalAcu1.0, NCBI)." 10.1186/s12983-017-0225-x
Phenotypic "Our results show an apparent reduction in the α-keratin gene repertoire and increased rate of pseudogenization in cetaceans when compared to terrestrial counterparts, which may be associated with their hairless phenotype." 10.1186/s12983-017-0225-x
Other "However, some genes within one specie grouped together rather than with the members of the same family in other species, such as among the genes of K31, K33A, K33B and K34 in type I, as well as the K6A, K6B, K6C, K81, K83, K87 and K86 in the type II." 10.1186/s12983-017-0225-x

Curator Observations

The authors named the keratins according to the human nomenclature. Despite there not being a shared conserved mutation across the lineage, the loss was considered to be lineage specific since the authors describe the loss as a whole gene absence in all analyzed cetaceans. Furthermore, they consider close terrestrial Artiodactyla species orthologs to be coding.

Related Glosses

GL_ID Symbol Species Order Gene Loss Mechanism Loss Type Lineage Specific Citation
GL_WQCG4R KRT33B Balaenoptera acutorostrata Artiodactyla Gene deletion Full No 10.1186/1471-2164-15-869