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PLoS One 2014 Oct 17;910:e62079. doi: 10.1371/journal.pone.0062079.
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Characterization of the highly variable immune response gene family, He185/333, in the sea urchin, Heliocidaris erythrogramma.

Roth MO , Wilkins AG , Cooke GM , Raftos DA , Nair SV .

This study characterizes the highly variable He185/333 genes, transcripts and proteins in coelomocytes of the sea urchin, Heliocidaris erythrogramma. Originally discovered in the purple sea urchin, Strongylocentrotus purpuratus, the products of this gene family participate in the anti-pathogen defenses of the host animals. Full-length He185/333 genes and transcripts are identified. Complete open reading frames of He185/333 homologues are analyzed as to their element structure, single nucleotide polymorphisms, indels and sequence repeats and are subjected to diversification analyses. The sequence elements that compose He185/333 are different to those identified for Sp185/333. Differences between Sp185/333 and He185/333 genes are also evident in the complexity of the sequences of the introns. He185/333 proteins show a diverse range of molecular weights on Western blots. The observed sizes and pIs of the proteins differ from predicted values, suggesting post-translational modifications and oligomerization. Immunofluorescence microscopy shows that He185/333 proteins are mainly located on the surface of coelomocyte subpopulations. Our data demonstrate that He185/333 bears the same substantial characteristics as their S. purpuratus homologues. However, we also identify several unique characteristics of He185/333 (such as novel element patterns, sequence repeats, distribution of positively-selected codons and introns), suggesting species-specific adaptations. All sequences in this publication have been submitted to Genbank (accession numbers JQ780171-JQ780321) and are listed in table S1.

PubMed ID: 25333281
PMC ID: PMC4204807
Article link: PLoS One

Species referenced: Heliocidaris erythrogramma
Genes referenced: 185-333 LOC100887844 LOC100893907 LOC105438357 LOC115919910 LOC115921237 LOC115925415 LOC590297 LOC594261
Antibodies: 185-333 Ab1 185-333 Ab2 185-333 Ab3

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References [+] :
Altschul, Gapped BLAST and PSI-BLAST: a new generation of protein database search programs. 1997, Pubmed