Radular myoglobin and protein variation within and among some littorinid species (Mollusca: Gastropoda)

Medeiros, Renata; Serpa, Larry; Brito, C.; Wolf, Hans; Jordaens, Kurt; Winnepenninckx, Birgitta; Backeljau, Thierry

doi:10.1007/978-94-011-5336-2_6

Cited by 3 publications

(3 citation statements)

References 33 publications

(39 reference statements)

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“…The morphological data set of Reid (1996) was updated and extended with data for the non-Littorina species (see Tables 4 and 5). In addition, data on radular myoglobin profiles obtained by isoelectric focusing (IEF) (Medeiros et al 1998) and features of the secondary structure of the 18S rRNA molecule were added to the morphological data set. We did not consider previously published allozyme data because such data are lacking for Littoraria undulata and N. punctata from the Cape Verde Islands.…”

Section: Discussionmentioning

confidence: 99%

“…In addition to morphological characters, two characters of the secondary structure of the 18S rRNA molecule (length of helix 10 and structure of the terminal helix part of E10-1; Fig. 2), as well as a qualitative assessment of IEF radular myoglobin profiles (Medeiros et al, 1998) are included. Figure 4A shows a tree length distribution on the basis of the characters of Table 4.…”

Section: Morphological Phylogenetic Analysesmentioning

confidence: 99%

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Performance of 18S rRNA in Littorinid Phylogeny (Gastropoda: Caenogastropoda)

1998

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In the past, 18S rRNA sequences have proved to be very useful for tracing ancient divergences but were rarely used for resolving more recent ones. Moreover, it was suggested that the molecule does not contain useful information to resolve divergences which took place during less than 40 Myr. The present paper takes littorinid phylogeny as a case study to reevaluate the utility of the molecule for resolving recent divergences. Two data sets for nine species of the snail family Littorinidae were analyzed, both separately and combined. One data set comprised 7 new complete 18S rRNA sequences aligned with 2 published littorinid sequences; the other comprised 12 morphological, 1 biochemical, and 2 18S rRNA secondary structure characters. On the basis of its ability to confirm generally accepted relationships and the congruence of results derived from the different data sets, it is concluded that 18S rRNA sequences do contain information to resolve "rapid" cladogenetic events, provided that they occurred in the not too distant past. 18S rRNA sequences yielded support for (1) the branching order (L. littorea, (L. obtusata, (L. saxatilis, L. compressa))) and (2) the basal position of L. striata in the Littorina clade.

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Section: Discussionmentioning

confidence: 99%

Section: Morphological Phylogenetic Analysesmentioning

confidence: 99%

Performance of 18S rRNA in Littorinid Phylogeny (Gastropoda: Caenogastropoda)

1998

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“…Despite the large size variation observed in the intron sequences of some species, this was considered a promising approach to analyze genetic variability and to identify species in this genus. Importantly, Mb sequences were employed in studies of systematics and population genetics of mollusks of different classes, in which the structural role of different polymorphisms in these proteins were investigated (Dewilde et al, 1998;Medeiros et al, 1998;Suzuki et al, 2003a, b;Lieb et al, 2006). Recently, the molecular and biochemical characterization of the myoglobin of the Brazilian species Biomphalaria was performed (Teixeira et al, 2011).…”

Section: Current Status Of the Studies On Brazilian Malacofaunamentioning

confidence: 99%

Molecular studies in Brazilian malacology: Tools, trends and perspectives

2013

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The use of molecular tools in Brazilian malacological studies was analyzed. We searched for these molecular tools by screening the annals of malacological events in Brazil and Latin America within the last 15 years. Information was obtained from a Brazilian curricula data bank (curriculum Lattes), which enabled the identification of the main national research groups, their main researchers and research focuses. An estimate of the scientific production on the basis of the analysis of these curricula is also provided. The main techniques and molecular markers employed were indicated. The data showed that these studies were concentrated in institutions in the South and Southeast regions and emphasized gastropods of medical importance. However, molecular studies that examined other gastropods, cephalopods and bivalves were also performed. No research study was found in the Central-West region of the country. The growth of this field of study in the country is expected, considering the molecular studies that have been performed and the great diversity of the molluscan fauna in Brazil. Future molecular studies on some taxa in the country, which have not yet been studied, should be contemplated. The increase in the use of sequencing techniques will help to bridge the gaps in our taxonomic and phylogenetic knowledge, contributing to the studies on biodiversity and conservation. Keywords: Molecular biology, malacology, snail, Brazil, DNA.

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