Analysis of eight cDNAs and six genes for intermediate filament (IF) proteins in the cephalochordate Branchiostoma reveals differences in the IF multigene families of lower chordates and the vertebrates

Riemer, Dieter; Karabinos, Anton; Weber, Klaus

doi:10.1016/s0378-1119(98)00151-6

Cited by 32 publications

(42 citation statements)

References 17 publications

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“…The short coil 1b subdomain originally reported for one IF protein of the cephalochordate Branchiostoma (Riemer et al 1992) has meanwhile also been documented in seven additionally established sequences of the lancelet (Riemer et al 1998). Thus the two urochordate sequences reported here (Fig.…”

Section: All Three Chordate Phyla Share the Short Coil 1b Lengthsupporting

confidence: 76%

“…The S-type is not restricted to vertebrates but also accounts for the first two urochordate IF sequences established here (Fig. 1) and eight IF proteins from the cephalochordate Branchiostoma (Riemer et al 1998). Thus the S-type is characteristic of all three chordate phyla and predates the divergence of the chordates.…”

Section: Discussionmentioning

confidence: 67%

“…The two IF sequences Riemer et al 1992) and also represents seven additional sequences (Riemer et al 1998). The following two lines (Ur1, Ur2) give the two IF sequences of the urochordate Styela.…”

Section: All Three Chordate Phyla Share the Short Coil 1b Lengthmentioning

confidence: 99%

“…In sharp contrast to these three protostomic phyla are the results on the cephalochordate Branchiostoma. The eight cytoplasmic IF proteins known have the short coil 1b length found in all vertebrate IF proteins and also lack a lamin relation in the tail domain (Riemer et al 1992(Riemer et al , 1998.…”

Section: Introductionmentioning

confidence: 99%

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Molecular Phylogeny of Metazoan Intermediate Filament Proteins

et al. 1998

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We have cloned cytoplasmic intermediate filament (IF) proteins from a large number of invertebrate phyla using cDNA probes, the monoclonal antibody IFA, peptide sequence information, and various RT-PCR procedures. Novel IF protein sequences reported here include the urochordata and nine protostomic phyla, i.e., Annelida, Brachiopoda, Chaetognatha, Echiura, Nematomorpha, Nemertea, Platyhelminthes, Phoronida, and Sipuncula. Taken together with the wealth of data on IF proteins of vertebrates and the results on IF proteins of Cephalochordata, Mollusca, Annelida, and Nematoda, two IF prototypes emerge. The L-type, which includes 35 sequences from 11 protostomic phyla, shares with the nuclear lamins the long version of the coil 1b subdomain and, in most cases, a homology segment of some 120 residues in the carboxyterminal tail domain. The S-type, which includes all four subfamilies (types I to IV) of vertebrate IF proteins, lacks 42 residues in the coil 1b subdomain and the carboxyterminal lamin homology segment. Since IF proteins from all three phyla of the chordates have the 42-residue deletion, this deletion arose in a progenitor prior to the divergence of the chordates into the urochordate, cephalochordate, and vertebrate lineages, possibly already at the origin of the deuterostomic branch. Four phyla recently placed into the protostomia on grounds of their 18S rDNA sequences (Brachiopoda, Nemertea, Phoronida, and Platyhelminthes) show IF proteins of the L-type and fit by sequence identity criteria into the lophotrochozoic branch of the protostomia.

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Section: All Three Chordate Phyla Share the Short Coil 1b Lengthsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 67%

Section: All Three Chordate Phyla Share the Short Coil 1b Lengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Molecular Phylogeny of Metazoan Intermediate Filament Proteins

et al. 1998

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“…However, the presence of 42 residues (6 heptads) in the coil 1b subdomain of the rod domain of DjIFb is a feature also displayed by vertebrate lamins (type V IFs) as well as other protostomic IFs (Erber et al 1998). Comparison of the exon/intron organization also gives valuable information about the evolutionary relationship among IFs, because the positions of many introns are conserved among IF multigene family members (for example, see Riemer et al 1998). The DjIFb gene has ten introns, out of which five introns located in the rod domain are coincident in their position, even in their codon phase, with the introns of some vertebrate and invertebrate IFs, including lamins.…”

Section: Structure Of a Planarian Intermediate Filament Genementioning

confidence: 99%

The body margin of the planarian Dugesia japonica : characterization by the expression of an intermediate filament gene

Kato

Orii

et al. 2002

Development Genes and Evolution

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We have cloned and sequenced a cDNA encoding an intermediate filament protein (IF) from the planarian Dugesia japonica named DjIFb. The deduced amino acid sequence of DjIFb has similarity to those of protostomic IFs and lamins, supporting a previous hypothesis that the protostomic IFs, including DjIFb, are evolutionarily closer to lamins than to vertebrate cytoplasmic IFs. In addition, analysis of the exon/intron organization revealed that 8 out of 10 introns of DjIFb were coincident in their position, even in the codon phase, with those of the non-neuronal IF of the snail Helix aspersa. This suggests that the Platyhelminthes are not the most primitive Bilateria but instead are evolutionarily close to the Mollusca. The DjIFb gene was expressed in particular cells, probably a kind of adhesive gland cell, which were present in the marginal region encircling the planarian body. The localization of DjIFb protein suggests that it plays an important role in the secretion of an adhesive substance. The specific expression pattern of the DjIFb gene enabled us to monitor how the body margin forms during planarian regeneration.

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Amphioxus type I keratin cDNA and the evolution of intermediate filament genes

Luke

Holland

1999

J. Exp. Zool.

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Analysis of eight cDNAs and six genes for intermediate filament (IF) proteins in the cephalochordate Branchiostoma reveals differences in the IF multigene families of lower chordates and the vertebrates

Cited by 32 publications

References 17 publications

Molecular Phylogeny of Metazoan Intermediate Filament Proteins

Molecular Phylogeny of Metazoan Intermediate Filament Proteins

The body margin of the planarian Dugesia japonica : characterization by the expression of an intermediate filament gene

Amphioxus type I keratin cDNA and the evolution of intermediate filament genes

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