Ask about this productRelated genes to: TIE1 antibody
- Gene:
- TIE1 NIH gene
- Name:
- tyrosine kinase with immunoglobulin like and EGF like domains 1
- Previous symbol:
- TIE
- Synonyms:
- JTK14
- Chromosome:
- 1p34.2
- Locus Type:
- gene with protein product
- Date approved:
- 1993-08-24
- Date modifiied:
- 2016-10-05
Related products to: TIE1 antibody
Related articles to: TIE1 antibody
- Fully autonomous apomixis with fertilization-independent embryo and endosperm development enables the production of clonal seeds to fix crop hybrid vigour. However, the mechanisms underlying autonomous endosperm development remain unclear. Here we show that TIE1 acts as a maternally expressed transcriptional repressor inhibiting autonomous endosperm. The disruption of four TIEs in tie1 tie2 tie3 tie4 (tieQ) mutants triggers the development of autonomous endosperm, recapitulating the phenotypes observed in fertilization-independent seeds (fis)-class mutants. TIE1 exhibits maternal genomic imprinting similar to MEDEA (MEA) that encodes a core component of the FIS-POLYCOMB REPRESSIVE COMPLEX 2 (PRC2). TIE1 recruits FIS-PRC2 to transcriptionally silence a subset of its target genes whose activation would otherwise trigger endosperm development in the absence of fertilization. Our findings reveal a maternally controlled brake mechanism that prevents autonomous endosperm development, providing both a molecular framework for understanding apomictic seed formation and a possible tool for engineering synthetic apomixis to fix heterosis in crops. - Source: PubMed
Publication date: 2026/07/28
Zhang ZeliangWang XinxueYuan RongrongLi YiyiPan YigeHe QingChen XuemeiQin Genji - Kinase inhibitors (KIs) are essential in targeted cancer therapy but frequently cause cardiotoxicity, limiting their clinical utility. A systematic resource to explore the underlying causal mechanisms is urgently needed. - Source: PubMed
Publication date: 2026/07/17
Wei JiaminLiu YinWu MiaoqingLi GuoyuanZheng XinyaoFu HuafengZhang JianLin Jijin - TIE-1 (TIE-1) is a metabolically versatile environmental bacterium that flourishes across gradients of iron, oxygen, and light. This versatility necessitates extensive regulatory control, exemplified by the aerobic-anaerobic metabolic shift controlled by the hierarchy of CRP/FNR-family regulators AadR and FixK. Many anaerobic metabolic pathways demand expression of iron cofactor-intensive proteins, and TIE-1 in particular can generate energy through phototrophic iron oxidation via the PioABC system. However, TIE-1 lacks canonical iron-sensing regulators: IscR, ancestral Fe(II)-sensing Fur, and Fe(II)-sensing RirA of , leaving it unclear how TIE-1 coordinates expression of these iron-requiring metabolisms with bioavailable iron levels. Here, we demonstrate that the AadR-FixK hierarchy plays a previously underappreciated role in iron regulation in TIE-1 by comparing growth and transcription in wild-type and regulatory mutants across wetland-inspired naturomimetic conditions. Δ and Δ showed defects in iron-dependent growth and Fe(II) oxidation, and the ΔΔ double mutant was synthetically lethal under anaerobiosis. The regulatory hierarchy of FixK and AadR influences expression of Fur-family regulators: the two paralogs were oppositely regulated in the presence of AadR, and absence of AadR perturbed iron-responsive expression of . Furthermore, the AadR regulon was significantly enriched for iron-related and iron-containing proteins. Despite initial predictions that AadR directly regulates , we found no conclusive evidence for direct AadR activity at the promoter, refining the search for regulators. Together, these findings establish AadR as a central integrator of oxygen and iron signals to coordinate iron-requiring anaerobic metabolism in TIE-1. - Source: PubMed
Publication date: 2026/06/29
Gallagher BrianRanaivoarisoa TahinaPrabhakar PremLi JingtaoRajkumar AnjaliGupta DineshKim JoshBose Arpita - Axillary bud dormancy is tightly regulated to control shoot branching through an intricate gene regulatory network (GRN). While epigenetic regulation of gene expression plays a key role in modulating GRNs underlying numerous developmental and physiological processes, its contribution to axillary bud dormancy remains largely unexplored. Here, we investigate the role of the plant polycomb repressive complex 1 (PRC1) component LIKE HETEROCHROMATIN PROTEIN 1 (LHP1) in lateral shoot branching. Arabidopsis thaliana lhp1 mutants exhibited increased axillary branching, whereas plants overexpressing LHP1 displayed reduced branching compared to wild-type plants. Consistently, the analysis of a transcriptional reporter revealed promoter activity within axillary bud tissues, further indicating that LHP1 plays a role in branch outgrowth repression. Notably, we found that LHP1 directly controls the TCP INTERACTOR CONTAINING EAR MOTIF PROTEIN 1 (TIE1) locus on axillary buds. TIE1 promotes axillary branch development by inhibiting the activity of the master regulator of bud dormancy BRANCHED1 (BRC1). Constitutive expression of TIE1 rescued the reduced-branching phenotype of 35S::LHP1-GFP plants. Moreover, BRC1 direct-target loci are induced when LHP1 is overexpressed and severely repressed when TIE1 is artificially expressed avoiding LHP1 control, further indicating that LHP1 acts upstream of TIE1 to induce bud dormancy. Altogether, these results reveal an epigenetic mechanism by which PRC1-mediated repression limits axillary branch development in Arabidopsis. - Source: PubMed
Schild CamilaMammarella María FlorenciaMansilla NatanaelMaslein DelfinaAriel FedericoLucero Leandro - Cerebral hypoperfusion and blood-brain barrier (BBB) leakiness are related to cognitive decline and the onset and spread of Aβ and tau pathology in Alzheimer's disease (AD). Disrupted angiopoietin/TIE (ANGPT/TIE) signalling causes neurovascular instability and BBB leakiness accelerating cognitive decline and disease pathology in mouse models of AD. To explore ANGPT/TIE signalling in human AD, we measured CSF TIE-1 and TIE-2 levels by ELISA in two independent clinical dementia cohorts, and serum and CSF Tie-1/-2 in paired CSF and serum samples from neurologically normal individuals. ANGPT1, ANGPT2, TIE-1 and TIE-2 levels were measured by ELISA in crude homogenate (CH) and microvessel-enriched fractions (MVFs) of post-mortem human parietal cortex in relation to biochemical markers of cerebral perfusion (MAG:PLP1) and BBB leakiness (parenchymal fibrinogen) in a control, AD, and vascular dementia (VaD) cohort. CSF soluble TIE-2 was elevated in AD biomarker+ve individuals and correlated positively with CSF t-tau and p-tau, and markers of BBB leakiness, neuronal injury, and neuroinflammation. Tissue TIE-2 levels were significantly reduced in Braak tangle stage (BS) III-IV, that is, brains with early-intermediate AD pathology, and were lower in MVFs in end-stage AD pathology (BSV-VI) than in controls or VaD. Lower levels of MVF TIE-2 correlated with markers of cerebral hypoperfusion and BBB leakiness. Our study reveals a reciprocal relationship between elevated CSF and reduced tissue TIE-2 expression that is related to markers of tau pathology, BBB leakiness, and cerebral hypoperfusion, providing novel insights into ANGPT/TIE signalling in AD. - Source: PubMed
Publication date: 2026/06/07
Ince SelviVan Hulle CarolKollmorgen GwendlynQuijano-Rubio ClaraGleason CareyBendlin Barbara BOkonkwo OziomaAsthana SanjayBlennow KajZetterberg HenrikJohnson Sterling CLove SethMiners J Scott