Exact(7)
To determine whether this resulted in new functions, functional analyses of the legume Adh genes in each clade will have to be performed in the future.
Changes in the expression pattern and accumulation of new mutations could result in new functions for the duplicated gene copy.
Furthermore, functional evolution of their regulatory sequences and coding sequences, driven by natural selection, could result in new functions within signaling networks [ 5, 9, 10].
The dependency on new domains to provide novel innovations in vertebrates is further minimized through the reuse of domains either through tandem duplications or reordering resulting in new functions (Bashton and Chothia 2002).
Overall this fits with the "diversifying selection model", described by Innan and Kondrashov [ 33], explaining how gene families can evolve and result in new functions for the individual members.
Although it retained the ancient RBX1 (RING-BOX 1) domain but found to be involved in new functions and pathway probably indicating the subfunctionalization. Phylogenetic study has supported the idea that loci AT3G42830 and AT5G2057 are relatively closer than locus AT3G05870 (data not shown).
Similar(53)
Regarding mutations that actually result in new function, the proportion of those is difficult to evaluate precisely, but textbooks classically tell us that somewhere between one for every 104 and 105 new mutations will lead to new or different functions, i.e. one in every one hundred to one thousand individuals.
Briefly, (1) duplicated genes are subject to mutation that can destroy incipient function; (2) during the relaxed selection period following the duplication one copy can acquire a beneficial mutation resulting in new function (neofunctionalization); and (3) the original functions of the single-copy gene may be partitioned between the duplicates (subfunctionalization).
In environmental bacteria, such a regulatory optimum is often unsettled following the knock-in of new functions through horizontal gene transfer (HGT), typically by conjugative plasmids [ 4].
These duplications were crucial in acquiring new functions, in skin or appendages, in response to the new terrestrial lifestyle [ 12].
Gene duplication, by which identical copies of genes are created within a single genome, is a major evolutionary process in producing new functions in eukaryotes.
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