Sequence and secondary structure of Porphyra umbilicalis 5S rRNA. Relevance for the evolutionary origin of red algae

About: This article is published in Nucleic Acids Research.The article was published on 1988-11-25 and is currently open access. It has received 3 citations till now. The article focuses on the topics: Porphyra umbilicalis & Red algae.

Summary

Summary

• This pattern can be explained by assuming that the ancestral, eukaryotic 5S rRNA shared the first two features with the archaebacterlal and eubacterial 5S rRNAs, and that these were altered in the eukaryotic branch of evolution only after the divergence of the red algae, the latter conserving these ancestral features until the present time.
• As such, the study of 5S rRNA secondary structure consolidates phylogenetic studies (4) based on 5S rRNA sequences and pointing to the red algae as the earliest diverging branch of the eukaryotes.

Full text

volume
16
Number
22 1988
Nucleic Acids Research
Sequence and secondary structure of Porphyra umbilicalis 5S rRNA. Relevance for the
evolutionary origin of red algae
Hilde Van den Eynde, Raymond De Baere and Rupert De Wachter
Departement Biochemie, Universiteit Antwerpen (UIA), Universiteitsplein 1, B-2610 Antwerp, Belgium
Submitted October 21, 1988 Accession no. X13222
The sequence
of the
nytoplasmic
5S
rRNA
of the red
alga Porphyra
umbilicalis
was
determined
and
fits
the
following secondary structure model:
A
M B I, C H,
C
AU
A
A
A
UG
C
C
CC
\
pACGUGCGGC GUGCGGAAC GCCGAAA
•
• C
UGUACGCCG CACGCCUCG CGGCUUU
<J
U-G V
A
A
U
A-A
A
A
G
C°
GC
o
G
U
:
C
A
C
-G
2
A
U
G
A
G-C
U»U
GC
A
•
U
E C-G-Q
U'A'
C
-G
C
-G
H
2
A G
G
G
This model, applicable
to all red
algal
5S
rRNAs (1),
has
certain features
reminiscent
of
bacterial rather than eukaryotic
5S
rRNAs,
as
documented below:
feature
(see
Presence
of
N°
of
bases
Symmetry
of
Presence
of
also refs.
bulge
on
in helix
loop
I
bulge(s)
5'
C
on
2
and
-strand
+ loop
helix
3)
of
"l
E
Archae-
bacteria
helix
B yes
27
sym.
sometimes
Eubacteria
yes
27
sym.
no
Eukaryotes
red algae other
yes
27
asym.
yes
no
26
asym.
yes
This pattern
can be
explained
by
assuming that
the
ancestral, eukaryotic
5S
rRNA shared
the
first
two
features with
the
archaebacterlal
and
eubacterial
5S
rRNAs,
and
that these were altered
in the
eukaryotic branch
of
evolution only
after
the
divergence
of the red
algae,
the
latter conserving these ancestral
features until
the
present time.
As
such,
the
study
of 5S
rRNA secondary
structure consolidates phylogenetic studies
(4)
based
on 5S
rRNA sequences
and
pointing
to the red
algae
as the
earliest diverging branch
of the
eukaryotes.
References:
1) Lira,
B.-L. et al.
(1986)
Jpn. J.
Genet.
61,
169-176.
2) Willekens,
P. et al.
(1986) Syst. Appl. Microbiol.
7,
151-157.
3)
Van den
Eynde,
H., De
Wachter,
R.
(1987) FEBS Lett.
217,
191-196.
4) Hori,
H.,
Osawa,
S.
(1987)
Mol.
Biol. Evol.
4,
445-472.
© IRL
Press
Limited, Oxford, England. 10919

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Q1. What contributions have the authors mentioned in the paper "Nucleic acids research sequence and secondary structure of porphyra umbilicalis 5s rrna. relevance for the evolutionary origin of red algae" ?

As such, the study of 5S rRNA secondary structure consolidates phylogenetic studies ( 4 ) based on 5S rRNA sequences and pointing to the red algae as the earliest diverging branch of the eukaryotes.