ANKS4B
- Known as:
- ANKS4B
- Catalog number:
- 001663A
- Product Quantity:
- 250ul
- Category:
- -
- Supplier:
- ABM
- Gene target:
- ANKS4B
Related genes to: ANKS4B
- Gene:
- ANKS4B NIH gene
- Name:
- ankyrin repeat and sterile alpha motif domain containing 4B
- Previous symbol:
- -
- Synonyms:
- FLJ38819, HARP
- Chromosome:
- 16p12.2
- Locus Type:
- gene with protein product
- Date approved:
- 2006-02-17
- Date modifiied:
- 2016-01-14
Related products to: ANKS4B
Related articles to: ANKS4B
- Mutations in the USH1G gene, which encodes the scaffold protein SANS, cause type-I Usher syndrome, a severe inherited disorder involving both hearing and vision loss. Although SANS has been implicated in nuclear pre-mRNA splicing, the molecular determinants of its nuclear import and their relevance to USH1G pathogenesis remain incompletely understood. Here, we report high-resolution crystal structures of the N-terminal ankyrin repeat regions of SANS and its homolog ANKS4B. We show that SANS_AR functions as a self-sufficient module that promotes nuclear localization, whereas ANKS4B_AR lacks this property. Structure-guided analysis of USH1G-associated variants suggests two distinct classes of effects: core hydrophobic mutations such as L48P, L84P impair SANS_AR solubility and are predicted to destabilize the domain, whereas surface-exposed substitutions such as R10W, S119P, and R146C remain compatible with soluble expression but reduce SANS nuclear localization. Together, these findings provide a molecular framework for understanding how impaired SANS_AR stability and defective nuclear localization may contribute to USH1G pathogenesis. - Source: PubMed
Publication date: 2026/08/28
Yan WenxiaChen GuanhaoWang LipingLi Jianchao - The protein SANS is a small multifunctional scaffold protein. It is involved in several different cellular processes, such as intracellular transport, in the cytoplasm, or splicing of pre-mRNA, in the cell nucleus. Here, we aimed to gain insight into the regulation of the subcellular localization and the nuclear-cytoplasmic shuttling of SANS and its paralog ANKS4B, not yet reported in the nucleus. We identified karyopherins mediating the nuclear import and export by screening the nuclear interactome of SANS. Sequence analyses predicted in silico evolutionarily conserved nuclear localization sequences (NLSs) and nuclear export sequences (NESs) in SANS, but only NESs in ANKS4B, which are suitable for karyopherin binding. Quantifying the nuclear-cytoplasmic localization of wild-type SANS and NLS/NES mutants, we experimentally confirmed in silico predicted NLS and NES functioning in the nuclear-cytoplasmic shuttling in situ in cells. The comparison of SANS and its paralog ANKS4B revealed substantial differences in the interaction with the nuclear splicing protein PRPF31 and in their nuclear localization. Finally, our results on pathogenic USH1G/SANS mutants suggest that the loss of NLSs and NESs and thereby the ability to control nuclear-cytoplasmic shuttling is disease-relevant. - Source: PubMed
Publication date: 2024/11/08
Fritze Jacques SStiehler Felizitas FWolfrum Uwe - An experiment was conducted to test the hypothesis that inclusion of a conventional torula yeast or a torula yeast produced from forestry byproducts (i.e., woody torula yeast) in diets for weanling pigs instead of fish meal and plasma protein improves growth performance and intestinal health of pigs. A total of 120 weanling pigs (6.53 ± 0.78 kg) were allotted to three treatments with ten replicate pens per diet. Pigs were fed one of three diets from days 1 to 14 post-weaning (phase 1), whereas all pigs were fed a common diet in phase 2 (days 15 to 28). The three treatments in phase 1 included a control diet with 5% fish meal, 3.5% plasma protein, and no torula yeast. The second diet contained 1.5% fish meal, 14% woody torula yeast, and no plasma protein, whereas the third diet contained 1.5% fish meal, 14% conventional torula yeast, and no plasma protein. Fecal scores were assessed every other day. On day 7, one pig per pen was euthanized to collect ileal tissue and mucosa for determination of morphology and for ribonucleic acid (RNA) sequencing analysis. At the end of phases 1 and 2, blood samples were collected and concentrations of cytokines, plasma urea nitrogen (PUN), peptide YY, immunoglobulin G, total protein, and albumin were analyzed. Results indicated that both torula yeast sources could replace fish meal and plasma protein without affecting growth performance, intestinal morphology, or blood characteristics of pigs. Pigs fed a diet containing torula yeast had improved (P < 0.05) fecal scores during phase 1. Pigs fed the conventional torula yeast diet had greater (P < 0.05) concentration of interleukin-2 compared with pigs fed the control diet. On day 14, greater (P < 0.05) concentrations of interleukin-4 and interleukin-10 were observed in pigs fed the diet containing the woody torula yeast or conventional torula yeast compared with pigs fed the control diet. Results from the RNA sequencing indicated that 19 of 24 analyzed genes involved in digestion and absorption of protein and vitamins were downregulated in pigs fed the diet containing woody torula yeast compared with pigs fed the control diet. However, only two genes (i.e., ANKS4B and FAM54A) were downregulated in pigs fed the woody torula yeast diet compared with the conventional torula yeast diet. In conclusion, using woody or conventional torula yeast instead of fish meal and plasma protein in the phase 1 diet for weanling pigs may improve intestinal health without influencing growth performance of pigs. - Source: PubMed
Espinosa Charmaine DTorres-Mendoza Leidy JStein Hans H - Intestinal enterocytes have an elaborate apical membrane of actin-rich protrusions known as microvilli. The organization of microvilli is orchestrated by the intermicrovillar adhesion complex (IMAC), which connects the distal tips of adjacent microvilli. The IMAC is composed of CDHR2 and CDHR5 as well as the scaffolding proteins USH1C, ANKS4B, and Myosin 7b (MYO7B). To create an IMAC, cells must transport the proteins to the apical membrane. Myosin 5b (MYO5B) is a molecular motor that traffics ion transporters to the apical membrane of enterocytes, and we hypothesized that MYO5B may also be responsible for the localization of IMAC proteins. To address this question, we used two different mouse models: ) neonatal germline MYO5B knockout (MYO5B KO) mice and ) adult intestinal-specific tamoxifen-inducible VillinCre;MYO5B mice. In control mice, immunostaining revealed that CDHR2, CDHR5, USH1C, and MYO7B were highly enriched at the tips of the microvilli. In contrast, neonatal germline and adult MYO5B-deficient mice showed loss of apical CDHR2, CDHR5, and MYO7B in the brush border and accumulation in a subapical compartment. Colocalization analysis revealed decreased Mander's coefficients in adult inducible MYO5B-deficient mice compared with control mice for CDHR2, CDHR5, USH1C, and MYO7B. Scanning electron microscopy images further demonstrated aberrant microvilli packing in adult inducible MYO5B-deficient mouse small intestine. These data indicate that MYO5B is responsible for the delivery of IMAC components to the apical membrane. The intestinal epithelium absorbs nutrients and water through an elaborate apical membrane of highly organized microvilli. Microvilli organization is regulated by the intermicrovillar adhesion complexes, which create links between neighboring microvilli and control microvilli packing and density. In this study, we report a new trafficking partner of the IMAC, Myosin 5b. Loss of Myosin 5b results in a disorganized brush border and failure of IMAC proteins to reach the distal tips of microvilli. - Source: PubMed
Publication date: 2022/10/11
Dooley Sarah AEngevik Kristen ADigrazia JessicaStubler RachelKaji IzumiKrystofiak EvanEngevik Amy C - Colon cancer is a malignant tumor with high morbidity and mortality. Researchers have tried to interpret it from different perspectives and divided it into different subtypes to facilitate individualized treatment. With the rise in the use of immunotherapy, its value in the field of tumor has begun to emerge. From the perspective of immune infiltration, this study classified colon cancer according to the infiltration of M2 macrophages in patients with colon cancer and further explored the same. - Source: PubMed
Publication date: 2021/09/06
Xu BoyangPeng ZiqiYan GuanyuWang NingningChen MoyeYao XueSun MingjunAn Yue