Biosilica formation in spicules of the sponge Suberites domuncula: Synchronous expression of a gene cluster

Schröder, Heinz C.; Perović-Ottstadt, Sanja; Grebenjuk, Vladislav A.; Engel, Sylvia G.; Müller, Isabel M.; Müller, Werner

doi:10.1016/j.ygeno.2005.02.005

Cited by 33 publications

(34 citation statements)

References 43 publications

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“…To date, protein-based mechanisms are central to discussions of silica biomineralization in sponges, and we also identified a silicatein-like protein in the spicules of A. aculeata (Figure S9). [6,7,[17][18][19][20][21] Our findings reveal that additional chemical factors are also associated with spicule formation in sponges.…”

Section: Resultsmentioning

confidence: 60%

Long‐Chain Polyamines (LCPAs) from Marine Sponge: Possible Implication in Spicule Formation

et al. 2007

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Two distinct marine organisms, diatoms and sponges, deposit dissolved silicates to construct highly architectural and species-specific body supports. Several factors such as proteins, long-chain polyamines (LCPAs), or polypeptides modified with LCPAs are known to be involved in this process. The LCPAs contained in the silica walls of diatoms are thought to play pivotal roles in the silica deposition. In sponges, however, a protein called silicatein and several other proteins have been reported to be the factors involved in the silica deposition. However, no other factors involved in this process have been reported. We have identified the LCPAs from the marine sponge Axinyssa aculeata and present here some evidence that sponge-derived LCPAs can deposit silica and that the LCPA derivatives are associated with spicules. The results indicate a common chemistry between sponges and diatoms, the two major players in the biological circulation of silicon in the marine environment. A wide variety of organisms are known to utilize silica in their biological processes. Polyamines or other functional molecules might be involved, in combination with proteins, in their biosilicification process.

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Section: Resultsmentioning

confidence: 60%

Long‐Chain Polyamines (LCPAs) from Marine Sponge: Possible Implication in Spicule Formation

et al. 2007

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“…The Japanese pearl oyster Pinctada fucata is the most studied molluskan model, for which a set of true enzymes and shell proteins has been identified. For the sponge Suberites domuncula, several genes have been identified by EST technology [45,50]. At last, the two vertebrate models have their genome fully sequenced.…”

Section: Comments Onmentioning

confidence: 99%

The Role of Enzymes in Biomineralization Processes

Weiss¹,

Marin²

2008

Biomineralization

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“…According to annotated genes known so far, sponges seem to have compact genomes with short introns and intergenic regions (Seack et al 1999;Müller et al 2003;Schröder et al 2005) and intron positions conserved from sponges to human (Müller et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Genscan for Arabidopsis is a valuable tool for predicting sponge coding sequences

Štifanić

Batel

2007

Biologia

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Although the first sponge genome project has already started releasing completed sequences, only a very small number of annotated sponge genomic sequences has so far been published. In addition, no gene-prediction software optimised for sponges is available yet. In the present paper, we present the performance of Arabidopsis-optimised Genscan as tested on sponge genes. All genes whose genomic and complete CDS sequences are deposited in the NCBI nucleotide database were retrieved and used as the test set. The 18 test genes are composed of 114 coding exons. The sensitivity and specificity, respectively, of all exons were predicted with 83.3% and 79.2%, internal exons with 88.5% and 80.2%, donor with 93.8% and 85.7%, acceptor with 89.6% and 78.9%, initiation with 94.4% and 85%, and termination sites with 72.2% and 81.3%. The results are compared with prediction results obtained with Genscan for vertebrates and GeneMark.hmm ES-3.0 for Arabidopsis. The surprising finding is that although the animals are the source of sequences, the best results (more than 80% accuracy in predicting complete exons) were obtained by Genscan optimised for a plant A. thaliana. Although the sample is small, the results lead to the conclusion that Genscan for Arabidopsis is a valuable tool for predicting coding sequences in sponges and could be of great help in annotating sponge genes.

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Biosilica formation in spicules of the sponge Suberites domuncula: Synchronous expression of a gene cluster

Cited by 33 publications

References 43 publications

Long‐Chain Polyamines (LCPAs) from Marine Sponge: Possible Implication in Spicule Formation

Long‐Chain Polyamines (LCPAs) from Marine Sponge: Possible Implication in Spicule Formation

The Role of Enzymes in Biomineralization Processes

Genscan for Arabidopsis is a valuable tool for predicting sponge coding sequences

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