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FB2025_05
,
released December 11, 2025
myosin-IB, Myo1C, Myo1B, myosin IB, DroMIB
motor protein present within the microvillus of the gut apical brush border where it forms lateral tethers between the microvillus membrane and underlying actin filament core - maintains structural integrity of the brush border domain enterocyte - provides resistance against oral infection by bacterial pathogens
Please see the JBrowse view of Dmel\Myo61F for information on other features
To submit a correction to a gene model please use the Contact FlyBase form
AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Some regions with low pLDDT may be unstructured in isolation.
Low-frequency RNA-Seq exon junction(s) not annotated.
Annotated transcripts do not represent all supported alternative splices within 5' UTR.
Gene model reviewed during 5.45
Gene model reviewed during 5.55
3.5 (northern blot)
1026 (aa); 118 (kD predicted)
Binds F-actin.
The myosin motor domain contains the derminants for the direction of left-right body asymmetry.
Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\Myo61F 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).
Myo61F transcripts are first observed in 8-12hr embryos, increase until the third instar larval stage and are present at a lower level in adults.
At embryonic stage 16, Myo61F protein is concentrated at the basolateral domain of immature enterocytes and is diffusely located in the cytoplasm. At embryonic stage 17, intense apical staining is observed in most regions of the gut. In larvae and adults, Myo61F protein is found in the brush border predominantly in the apical microvillar domain. In egg chambers, it is found in the basolateral domain of follicle cells until stage 8 after which it is more apically positioned. In stage 10, the localization of Myo61F protein to the api al domain of columnar follicle cells near the oocyte is thought to correspond to the microvilli of the brush border which exists there.
Myo61F protein is localized to the brush border of enterocytes through the entire length of the larval midgut. It is also localized to the brush borders of specialized secretory cells of the digestive sytem, including the proventriculus, gastric ceaca, cuprophilic cells, and in the apical domain of epithelial cells of Malphigian tubules. In adults, Myo61F is expressed in high levels in the inner chiasm of the optic lobe, with significant expression in the lamina and medulla. Myo61F is also expressed in photoreceptors, where it is concentrated at the base of microvilli.
Myo61F protein is first detected on western blots in 12-16hr embryos, increases dramatically at the end of embryogenesis and in first instar larvae, increases slightly in later larval stages, is present at low levels in pupae and is observed at higher levels in adults. Myo61F protein is detected by immunolocalization in the alimentary canal and its derivatives and in egg chambers. In stage 17 embryos, it is observed in the gastric caeca but not in the foregut. A gradient of expression is observed in the midgut with most of the staining in the posterior midgut and increasingly less in the middle midgut and anterior midgut. Some protein is present in the hindgut. In egg chambers, protein is present in follicle cells. By stage 10, it is associated only with columnar follicle cells surrounding the oocyte. Additionally, it is associated with centripetally migrating follicle cells over the anterior of the oocyte.
JBrowse - Visual display of RNA-Seq signals
View Dmel\Myo61F in JBrowse
3-0
3-1.7
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
Myo61F has a role in maintaining the structural integrity of the brush border domain the larval midgut enterocyte and in providing resistance against oral infection by bacterial pathogens.
Myo61F is required for normal left-right handedness of the embryonic gut.
dsRNA made from templates generated with primers directed against this gene tested in RNAi screen for effects on Kc167 and S2R+ cell morphology.
dsRNA made from templates generated with primers directed against this gene is tested in an RNAi screen for effects on actin-based lamella formation.
Isolation and characterisation of Myo61F.
Cloning and characterisation of Myo61F.
