dSMN, l(3)73Ao, survival of motor neurons
RNA binding protein involved, along with Gemins, in the assembly of the small nuclear ribonucleoproteins that constitute the spliceosome - neuromuscular junction protein required in both neurons and muscle for normal junctional morphology
Please see the JBrowse view of Dmel\Smn for information on other features
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AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Some regions with low pLDDT may be unstructured in isolation.
Gene model reviewed during 5.44
Gene model reviewed during 5.45
Homodimer (via C-terminal region) (PubMed:11113446, PubMed:12783845, PubMed:22813737). Component of the core survival motor neuron (SMN) complex composed of Smn, Gem2, Gem3, rig/Gem5 and one of 3 almost identical Gem4 paralogs encoded by Glos/Gem4a, Gem4b or Gem4c (PubMed:30563832). Interacts with Gem3 (via C-terminus); the interaction is direct and stabilizes Smn (PubMed:18923150, PubMed:19023405). Part of a minimal SMN complex composed of Smn and Gem2 only; this complex is active in UsnRNP assembly (PubMed:18621711, PubMed:23333303). The SMN complex associates with the entire set of spliceosomal snRNP Sm proteins, SmB, SmD1, SmD2, SmD3, SmE, SmF and SmG, and with the snRNP-specific proteins snRNP-U1-70K, U2A, snf/U1A and U5-116KD (PubMed:18621711, PubMed:23333303). Interacts with Glos/Gem4a; the interaction is probably indirect (PubMed:28949413, PubMed:30563832). Interacts with Sbat and Vlet; Sbat and Vlet, along with Hez, may form an accessory subcomplex involved in SMN complex function (PubMed:28949413). Interacts weakly with Gem3 (PubMed:18621711). Interacts with SmB and SmD1; the interaction is favored by methylation of the Sm proteins (PubMed:16753561, PubMed:18369183). Interacts with Actn; the interaction occurs in thoracic tissues and in adult flies (PubMed:17353360). Interacts with Rpp20 (PubMed:14715275). Interacts with msk and Snup; these interactions are RNA-dependent (PubMed:23885126).
Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\Smn using the Feature Mapper tool.
The testis specificity index was calculated from modENCODE tissue expression data by Vedelek et al., 2018 to indicate the degree of testis enrichment compared to other tissues. Scores range from -2.52 (underrepresented) to 5.2 (very high testis bias).
Comment: maternally deposited
Comment: postsynaptic region
While Smn is a ubiquitously expressed protein, the levels are modulated in different tissues. Smn is expressed in the ventral ganglion of the developing larval CNS. In early first instar larvae, it is ubiquitous and located in puncate bodies. During late first instar and second instar stages, levels increase in cells that correspond to quiescent postembryonic neuroblasts (pNBs). Smn accumulation increases, with the highest expression found in the cytoplasm of second and third instar dividing pNBs. After division, levels are higher in the neuroblast than in the ganglion mother cell. Levels decrease in a gradient through the daughter cells until reaching a basal level in differentiated neurons and glia. In the larval brain, Smn is enriched in type ID, IA, and all mira-staining neuroblasts of the brain lobes. Smn is expressed in the adult testis where it is localized to the apical tip. Smn is enriched in germline stem cells (GSCs) and levels decrease as cells differentiate, forming a gradient. Staining is undetectable in hub cells, is very high in GSCs, remains high in gonialblasts and spermatogonia, and decreses dramatically in spermatocytes.
JBrowse - Visual display of RNA-Seq signals
View Dmel\Smn in JBrowse





3-44
3-39.2
Please Note FlyBase no longer curates genomic clone accessions so this list may not be complete
Please Note This section lists cDNAs and ESTs that fall within the genomic extent of the gene model, which may include cDNAs and ESTs of genes within introns, or of overlapping genes. Please see JBrowse for alignment of the cDNAs and ESTs to the gene model.
For each fully sequenced cDNA the DGRC maintains various forms of the cDNA (e.g tagged or untagged) in several different host vectors for subsequent cloning and expression in Drosophila and Drosophila cell lines.
polyclonal
monoclonal
New stable cell line derived from S2-unspecified : An inducible stable S2 cell line was created that expresses epitope-tagged Smn. The "TagIt" epitope consists of the first 30 amino acids of human SMN protein.
Smn mutant animals show progressive loss of mobility and increasingly uncoordinated movement.
Mutants show defects at the neuromuscular junction.
Source for merge of: Smn l(3)73Ao
Source for identity of Smn CG16725 was sequence comparison ( date:001007 ).
Source for identity of: Smn CG16725