| |
front page
glossary
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
80s
70s
60s
50s
40s
30s
20s
10s
|
-
S Aparicio, K Hawker, A Cottage, Y Mikawa, L Zuo, B Venkatesh,
E Chen, R Krumlauf, S Brenner (1997),
"Organization of the Fugu rubripes Hox clusters: evidence for
continuing evolution of vertebrate Hox complexes",
Nature Genetics, 16:79-83.
-
WJ Bailey, J Kim, GP Wagner and FH Ruddle (1997),
"Phylogenetic reconstruction of vertebrate Hox cluster duplications",
Molecular Biology and Evolution, 14:843-853.
[abstract]
-
David Briggs, Stuart Max Walters (1997),
Plant Variation and Evolution
(Cambridge University Press). ISBN 0521459184
-
Alexander D Cameron, Birgit Olin, Marianne Ridderström, Bengt Mannervik, TAlwyn Jones
(1997),
"Crystal structure of human glyoxalase I?evidence for gene duplication and 3D domain swapping",
The EMBO Journal, 16:3386-3395.
[ abstract]
-
E Coissac, E Maillier, P Netter (1997),
"A comparative study of duplications in bacteria and
eukaryotes: the importance of telomeres",
Molecular Biology and Evolution, 14:1062-1074.
[ PDF]
-
T Endo, T Imanishi, T Gojobori, H Inoko (1997),
"Evolutionary significance of intra-genome duplications
on human chromosomes",
Gene, 205: 19-27
abstract:
Phylogenetic analyses indicated that a series of paralogous gene pairs,
found in two extensive regions on human chromosomal bands 6p21.3 and
9q33-34, were created by at least two independent duplications. The
duplicated genes on chromosomal band 6p21.3 include the genes for type
11 collagen 2 subunit (COL11A2), NOTCH4 (mouse int-3 homologue),
70 kDa heat shock protein (HSPA1A, HSPA1B, and HSPA1L), valyl-tRNA
synthetase 2 (VARS2), complement components (C2 and C4), pre-B cell
leukemia transcription factor 2 (PBX2), retinoid X receptor (RXRB),
NAT/RING3, and four other proteins. Their paralogous genes on
chromosomal band 9q33-34 are genes for type 5 collagen 1 subunit
(COL5A1), NOTCH1, 78 kDa glucose-regulated protein (HSPA5),
valyl-tRNA synthetase 1 (VARS1), complement component V (C5), PBX3,
retinoid X receptor (RXRA), ORFX/RING3L, and others. Among these,
the genes for collagen, complement components, NAT/RING3, PBX, and
RXR appear to have been duplicated around the time of vertebrate
emergence, supporting the idea that they were duplicated simultaneously
at that time. Another group of genes that includes NOTCH and HSP
appear to have diverged long before that time. A comparison of the
physical maps of these two regions revealed that the genes which
duplicated in the same period were arranged in almost the same order in
the two regions, with the assumption of a few chromosomal
rearrangements. We propose a possible model for the evolution of these
regions, taking into account the molecular mechanisms of regional
duplication, gene duplication, translocation, and inversion. We also
propose that a comparative mapping of paralogous genes within the human
genome would be useful for identifying new genes.
-
Hector Escriva, Rachid Safi, Catherine Hänni, Marie-Claire Langlois,
Pierre Saumitou-Laprade, Dominique Stehelin, André Capron, Raymond Pierce,
Vincent Laudet (1997),
"Ligand binding was acquired during evolution of nuclear receptors",
Proceedings of National Academy of Sciences, 94:6803-6808.
[abstract]
-
BS Gaut, JF Doebley (1997),
"DNA sequence evidence for the segmental allotetraploid origin
of maize",
Proceedings of National Academy of Sciences, 94:6809-6814.
Comments by Skrabanek and Wolfe (1998) :
The authors propose that the duplicated regions of
the maize genome arose from segmental
allotetraploidy and they provide a very clear and
reasoned explanation of their model. Molecular clock
analysis of 14 maize gene pairs yielded two
non-overlapping groups of date estimates centred
on 11.4 and 20.5 Mya. An allotetraploid ancestor is
proposed to have gone through a phase of
tetrasomic inheritance - each locus has four alleles -
before becoming 'diploidised' (disomic). At each
locus, genetic drift during the tetrasomic phase might
result in the loss of alleles inherited from one of the
progenitor species, or alleles from both progenitors
might be retained. Consequently, after diploidisation,
the divergence time between the two sequences at a
duplicated locus could correspond either to the
speciation time between the two progenitors (20.5
Mya), or to the time of establishment of disomy (11.4
Mya). It would be impossible to predict the outcome
for any particular locus.
-
S Henikoff, EA Greene, S Pietrokovski, P Bork, TK Attwood, L Hood
(1997), "Gene families: the taxonomy of protein paralogs and chimeras",
Science, 278:609-614.
-
PW Holland (1997),
"Vertebrate evolution: something fishy about Hox genes",
Current Biology, 7:R570-R572.
-
M Kasahara (1997),
"New insights into the genomic organization and origin of
the major histocompatibility complex: role of chromosomal
(genome) duplication in the emergence of the adaptive immune system",
Hereditas, 127:59-65.
-
M Kasahara, J Nakaya, Y Satta, N Takahata (1997),
"Chromosomal duplication and the emergence of the adaptive immune system",
Trends in Genetics, 13(3):90-92.
-
V Laudet (1997),
"Evolution of the nuclear receptor superfamily: early diversification from an
ancestral orphan receptor",
Journal of Molecular Endocrinology, 19(3):207-226.
[abstract]
-
IJ Leitch, MD Bennett (1997),
"Polyploidy in angiosperms",
Trends in Plant Science, 2:470-476.
-
B Mirkin, I Muchnik, TF Smith (1997),
"A biologically consistent model for comparing
molecular phylogenies",
Journal of Computational Biology, 4:177-187.
abstract:
In the framework of the problem of combining different gene trees into a
unique species phylogeny, a model for duplication/speciation/loss events
along the evolutionary tree is introduced. The model is employed for
embedding a phylogeny tree into another one via the so-called
duplication/speciation principle requiring that the gene duplicated evolves
in such a way that any of the contemporary species involved bears only
one of the gene copies diverged. The number of biologically meaningful
elements in the embedding result (duplications, losses, information gaps)
is considered a (asymmetric) dissimilarity measure between the trees. The
model duplication concept is compared with that one defined previously
in terms of a mapping procedure for the trees. A graph-theoretic
reformulation of the measure is derived.
-
JH Nadeau, D Sankoff (1997),
"Comparable rates of gene loss and functional divergence after genome duplications
early in vertebrate evolution",
Genetics, 147:1259-1266.
[abstract]
-
JA Scheffler, AG Sharpe, H Schmidt, P Sperling, IAP Parkin, W Lühs, DJ Lydiate,
E Heinz (1997),
"Desaturase multigene families of Brassica napus arose through genome duplication",
TAG Theoretical and Applied Genetics, 94(5):583-591.
[ abstract]
-
J Spring (1997),
"Vertebrate evolution by interspecific hybridization -
are we polyploid?",
FEBS Letters, 400:2-8.
-
Javier Tamames, Georg Casari, Christos Ouzounis, Alfonso Valencia (1997),
"Conserved clusters of functionally related genes in two bacterial genomes",
Journal of Molecular Evolution, 44(1):66-73.
abstract:
An approach for genome comparison, combining function
classification of gene products and sequence comparison, is presented. The
genomes of Haemophilus influenzae and Escherichia coli are analyzed, and all
genes are classified into nine major functional classes, corresponding to
important cellular processes. To study gene order relationships and genome
organization in the two bacteria, we performed statistics on neighboring pairs
of genes. To estimate the significance of the observations, a statistical model
based on binomial distributions has been developed. Significant patterns of
gene order are observed within, as well as between, the two bacterial
genomes: Functionally related genes tend to be neighbors more often than do
unrelated genes. Some of these groups represent well-known operons, but
additional gene clusters are identified. These clusters correspond to genomic
elements that have been conserved during bacterial evolution. In addition to
nearest-neighbor relationships, the method is also useful to study the relative
direction of transcription in genomes, which is also highly conserved between
homologous gene pairs. This new approach combines the high-level
description of molecular function with pair statistics that express genome
organization. It is expected to complement traditional methods of sequence
analysis in the study of genomic structure, function, and evolution.
]
-
Hidemi Watanabe, Hirotada Mori, Takeshi Itoh, Takashi Gojobori
(1997),
"Genome plasticity as a paradigm of eubacteria evolution",
Journal of Molecular Evolution, 44(suppl 1):S057-S064.
abstract:
To test the hypotheses that eubacterial genomes leave
evolutionarily stable structures and that the variety of genome size is brought
about through genome doubling during evolution, the genome structures of
Haemophilus influenzae, Mycoplasma genitalium, Escherichia coli, and
Bacillus subtilis were compared using the DNA sequences of the entire
genome or substantial portions of genome. In these comparisons, the locations
of orthologous genes were examined among different genomes. Using
orthologous genes for the comparisons guaranteed that differences revealed in
physical location would reflect changes in genome structure after speciation.
We found that dynamic rearrangements have so frequently occurred in
eubacterial genomes as to break operon structures during evolution, even
after the relatively recent divergence between E. coli and H. influenzae.
Interestingly, in such eubacterial genomes of high plasticity, we could find
several highly conservative regions with the longest conserved region
comprising the S10, spc, and ! operons. This suggests that such exceptional
conservative regions have undergone strong structural constraints during
evolution.
]
-
KH Wolfe, DC Shields (1997),
"Molecular evidence for an ancient duplication of the
entire yeast genome",
Nature, 387:708-713.
abstract:
Gene duplication is an important source of evolutionary novelty. Most
duplications are of just a single gene, but Ohno proposed that
whole-genome duplication (polyploidy) is an important evolutionary
mechanism. Many duplicate genes have been found in Saccharomyces
cerevisiae, and these often seem to be phenotypically redundant. Here
we show that the arrangement of duplicated genes in the S. cerevisiae
genome is consistent with Ohno's hypothesis. We propose a model in
which this species is a degenerate tetraploid resulting from a
whole-genome duplication that occurred after the divergence of
Saccharomyces from Kluyveromyces. Only a small fraction of the genes
were subsequently retained in duplicate (most were deleted), and gene
order was rearranged by many reciprocal translocations between
chromosomes. Protein pairs derived from this duplication event make up
13% of all yeast proteins, and include pairs of transcription factors,
protein kinases, myosins, cyclins and pheromones. Tetraploidy may have
facilitated the evolution of anaerobic fermentation in Saccharomyces.
|