Description: Homo sapiens synemin, intermediate filament protein (SYNM), transcript variant A, mRNA. RefSeq Summary (NM_145728): The protein encoded by this gene is an intermediate filament (IF) family member. IF proteins are cytoskeletal proteins that confer resistance to mechanical stress and are encoded by a dispersed multigene family. This protein has been found to form a linkage between desmin, which is a subunit of the IF network, and the extracellular matrix, and provides an important structural support in muscle. Two alternatively spliced variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2008]. Transcript (Including UTRs) Position: hg19 chr15:99,645,286-99,675,800 Size: 30,515 Total Exon Count: 5 Strand: + Coding Region Position: hg19 chr15:99,645,406-99,673,263 Size: 27,858 Coding Exon Count: 5
ID:SYNEM_HUMAN DESCRIPTION: RecName: Full=Synemin; AltName: Full=Desmuslin; FUNCTION: Type-VI intermediate filament (IF) which plays an important cytoskeletal role within the muscle cell cytoskeleton. It forms heteropolymeric IFs with desmin and/or vimentin, and via its interaction with cytoskeletal proteins alpha-dystrobrevin, dystrophin, talin-1, utrophin and vinculin, is able to link these heteropolymeric IFs to adherens-type junctions, such as to the costameres, neuromuscular junctions, and myotendinous junctions within striated muscle cells. SUBUNIT: Interacts with GFAP and VIM (By similarity). Isoform 1 interacts with TLN1 and VCL. Isoform 2 interacts with DES and DTNA. Isoform 1 and isoform 2 interact with DMD and UTRN. SUBCELLULAR LOCATION: Cytoplasm, cytoskeleton. Cell junction, adherens junction. Note=There are at least two distinct SYNM subpopulations, one in which SYMN interacts with DES within the Z- lines, and another in which it interacts with both DTNA and DES at the costamere. TISSUE SPECIFICITY: Isoform 2 is strongly detected in adult heart, fetal skeletal muscles and fetal heart. Isoform 1 is weakly detected in fetal heart and also in fetal skeletal muscle. Isoform 1 and isoform 2 are detected in adult bladder (at protein level). The mRNA is predominantly expressed in heart and muscle with some expression in brain which may be due to tissue-specific isoforms. DEVELOPMENTAL STAGE: In lens, first detected at 16 weeks when expression is weakly and uniformly distributed. Subsequently, expression becomes much stronger in the epithelium of the anterior part at 25 weeks and later. In retina, weakly expressed at 15 weeks in the nerve fiber and ganglion cell layers (NFL and GCL). From 25 weeks onwards, much stronger expression is observed in the endfeet of Mueller cells, the NFL, and GCL, and much lower expression is observed in a minor subpopulation of cells in the inner cell layer (INL). At 30 and 36 weeks, expression remains in the neural retina, and subsequently becomes stronger in the NFL, GCL, and INL and is decreased in Mueller cells. At 36 weeks, also expressed at the external border of the outer nuclear layer (ONL) (at protein level). SIMILARITY: Belongs to the intermediate filament family. SEQUENCE CAUTION: Sequence=AAI10067.1; Type=Erroneous initiation; Sequence=BAA20810.2; Type=Erroneous initiation;
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
Pfam Domains: PF00038 - Intermediate filament protein
ModBase Predicted Comparative 3D Structure on O15061
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Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.