GEPHE SUMMARY
Gephebase Gene
Entry Status
Published
GepheID
GP00000988
Main curator
Courtier
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Primate ancestor
Trait State in Taxon B
Colobus guereza
Ancestral State
Data not curated
Taxonomic Status
Taxon A
Latin Name
Common Name
-
Synonyms
Primata; Primates Linnaeus, 1758
Rank
order
Lineage
Show more ... erostomia; Chordata; Craniata; Vertebrata; Gnathostomata; Teleostomi; Euteleostomi; Sarcopterygii; Dipnotetrapodomorpha; Tetrapoda; Amniota; Mammalia; Theria; Eutheria; Boreoeutheria; Euarchontoglires
NCBI Taxonomy ID
is Taxon A an Infraspecies?
No
Taxon B
Common Name
mantled guereza
Synonyms
Colobus abyssinicus; mantled guereza; eastern black-and -white colobus; guereza; Colobus abyssinicus (Oken, 1816); Colobus guereza Rueppell, 1835
Rank
species
Lineage
Show more ... otetrapodomorpha; Tetrapoda; Amniota; Mammalia; Theria; Eutheria; Boreoeutheria; Euarchontoglires; Primates; Haplorrhini; Simiiformes; Catarrhini; Cercopithecoidea; Cercopithecidae; Colobinae; Colobus
NCBI Taxonomy ID
is Taxon B an Infraspecies?
No
GENOTYPIC CHANGE
Generic Gene Name
RNASE1B
Synonyms
-
String
-
Sequence Similarities
Belongs to the pancreatic ribonuclease family.
GO - Biological Process
-
UniProtKB
Pygathrix nemaeus
GenebankID or UniProtKB
Mutation #1
Presumptive Null
No
Molecular Type
Aberration Type
SNP
SNP Coding Change
Nonsynonymous
Molecular Details of the Mutation
The three amino acid changes R4Q K6E R39W have a phenotypic effect in combination - the effect of a single amino acid change has not been tested - the fact that they evolved independently in another lineage suggests that they all have a phenotypic effect
Experimental Evidence
Taxon A Taxon B Position
Codon - - -
Amino-acid Arg Gln 4
Authors
Zhang J
Abstract
Similar morphological or physiological changes occurring in multiple evolutionary lineages are not uncommon. Such parallel changes are believed to be adaptive, because a complex character is unlikely to originate more than once by chance. However, the occurrence of adaptive parallel amino acid substitutions is debated. Here I propose four requirements for establishing adaptive parallel evolution at the protein sequence level and use these criteria to demonstrate such a case. I report that the gene encoding pancreatic ribonuclease was duplicated independently in Asian and African leaf-eating monkeys. Statistical analyses of DNA sequences, functional assays of reconstructed ancestral proteins and site-directed mutagenesis show that the new genes acquired enhanced digestive efficiencies through parallel amino acid replacements driven by darwinian selection. They also lost a non-digestive function independently, under a relaxed selective constraint. These results demonstrate that despite the overall stochasticity, even molecular evolution has a certain degree of repeatability and predictability under the pressures of natural selection.
Additional References
Mutation #2
Presumptive Null
No
Molecular Type
Aberration Type
SNP
SNP Coding Change
Nonsynonymous
Molecular Details of the Mutation
The three amino acid changes R4Q K6E R39W have a phenotypic effect in combination - the effect of a single amino acid change has not been tested - the fact that they evolved independently in another lineage suggests that they all have a phenotypic effect
Experimental Evidence
Taxon A Taxon B Position
Codon - - -
Amino-acid Lys Glu 6
Authors
Zhang J
Abstract
Similar morphological or physiological changes occurring in multiple evolutionary lineages are not uncommon. Such parallel changes are believed to be adaptive, because a complex character is unlikely to originate more than once by chance. However, the occurrence of adaptive parallel amino acid substitutions is debated. Here I propose four requirements for establishing adaptive parallel evolution at the protein sequence level and use these criteria to demonstrate such a case. I report that the gene encoding pancreatic ribonuclease was duplicated independently in Asian and African leaf-eating monkeys. Statistical analyses of DNA sequences, functional assays of reconstructed ancestral proteins and site-directed mutagenesis show that the new genes acquired enhanced digestive efficiencies through parallel amino acid replacements driven by darwinian selection. They also lost a non-digestive function independently, under a relaxed selective constraint. These results demonstrate that despite the overall stochasticity, even molecular evolution has a certain degree of repeatability and predictability under the pressures of natural selection.
Additional References
Mutation #3
Presumptive Null
No
Molecular Type
Aberration Type
SNP
SNP Coding Change
Nonsynonymous
Molecular Details of the Mutation
The three amino acid changes R4Q K6E R39W have a phenotypic effect in combination - the effect of a single amino acid change has not been tested - the fact that they evolved independently in another lineage suggests that they all have a phenotypic effect
Experimental Evidence
Taxon A Taxon B Position
Codon - - -
Amino-acid Arg Trp 39
Authors
Zhang J
Abstract
Similar morphological or physiological changes occurring in multiple evolutionary lineages are not uncommon. Such parallel changes are believed to be adaptive, because a complex character is unlikely to originate more than once by chance. However, the occurrence of adaptive parallel amino acid substitutions is debated. Here I propose four requirements for establishing adaptive parallel evolution at the protein sequence level and use these criteria to demonstrate such a case. I report that the gene encoding pancreatic ribonuclease was duplicated independently in Asian and African leaf-eating monkeys. Statistical analyses of DNA sequences, functional assays of reconstructed ancestral proteins and site-directed mutagenesis show that the new genes acquired enhanced digestive efficiencies through parallel amino acid replacements driven by darwinian selection. They also lost a non-digestive function independently, under a relaxed selective constraint. These results demonstrate that despite the overall stochasticity, even molecular evolution has a certain degree of repeatability and predictability under the pressures of natural selection.
Additional References
RELATED GEPHE
Related Genes
No matches found.
Related Haplotypes
1
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