PhD project: The ERM–actin interface in cell shape

PhD project: The ERM–actin interface in cell shape

Quick Decision

This project joins molecular structure with cell mechanics: how does the actin-binding end of an ERM linker connect the plasma membrane to the cytoskeleton, and what changes when that interaction is perturbed? It offers a useful combination of protein biophysics, fluorescence imaging, simplified membrane systems and live-cell interpretation. The official project identifies Professor Ann Dixon in Chemistry as primary supervisor, with Darius Köster in Warwick Medical School as secondary supervisor, and Warwick registration. Exact project.

Assessment: Strong but verify fit. The scientific case is a specific unresolved binding interface, supported by complementary structural and mechanobiology groups. The main research risk is whether structural observations in an isolated domain explain the regulated protein and its cellular context. MIBTP application information lists October 2027 entry and a 23 November 2026 deadline; no cutoff time or time zone is stated, and whether applications are still being accepted is unconfirmed. Warwick explicitly covers the international tuition-fee difference for successful MIBTP students; selection remains competitive within an overall international allocation of up to 30%. Confirm the intended ERM family member and the personal award terms before interpreting the worldwide funding label as an awarded studentship. MIBTP application information.

Research Problem and Doctoral Work

The Unresolved Interface

ERM proteins connect membrane lipids to actin filaments. Their regulation matters for cell shape, rigidity and movement. The proposal focuses on the C-terminal actin-binding region, where it describes a shortage of high-resolution structural information. It mentions two residues implicated by earlier work, but does not identify that paper or specify which ERM family member will be the main target. Ezrin is a motivating example; it is not enough evidence to rename the whole project an exclusively ezrin PhD. Project.

The experimental contrast is valuable: simplified systems can isolate an interaction, while cells reveal whether it matters amid competing partners and regulation. A result in one system does not automatically transfer to the other. The distinction already appears in Köster's coauthored 2015 ezrin-domain study: reconstitution and TIRF imaging established functional actin binding, but the isolated domain and artificial anchoring bypassed aspects of native full-length regulation. This is foundational work, outside the recent-paper selection; it did not supply an atomic actin-bound structure. Original study.

Advertised Work and Useful Outcomes

The advertised work combines protein preparation, biochemical characterization, NMR, advanced fluorescence microscopy, live cells and minimal actin/membrane systems. Its aim is to characterize the domain, its actin interaction and the effect of structure-led binding inhibitors. A credible thesis could connect a structural or dynamic observation to a quantitative binding phenotype and a bounded cellular consequence. Those are potential outputs, not promised discoveries or an established drug-development pipeline. Project.

The most informative planning questions concern what the structure actually represents: free versus bound domain, an isolated fragment versus regulated full-length protein, and the contribution of the membrane environment. Binding, filament organization, cell shape and migration are different levels of evidence. A change in a fluorescent image alone would not establish selective inhibition of the ERM–actin interface. Likewise, an inhibitor's effect on cells could involve unrelated targets. These are analytical issues to discuss with the team, not extra advertised admission requirements.

The translational motivation is plausible because ERM dysregulation is relevant to disease, but this report has not independently audited the proposal's broad statement about previous candidates failing to reach clinical use. It should not be repeated as a comprehensive clinical-trial conclusion. Atomic insight, selective cellular activity and patient benefit are separate milestones. The project has value as basic structural cell biology even if it yields no clinically usable inhibitor.

School, Programme and Field Context

Warwick is the registration institution. Dixon's home is the Department of Chemistry; Köster contributes the Medical School/Centre for Mechanochemical Cell Biology environment. This is internal cross-department supervision, with no evidence of a second degree-awarding university or joint degree. The current directory lists the topic under Structural Biology, separately from Dixon's MHC membrane-asymmetry project. The central Warwick MIBTP application nevertheless directs candidates to School of Life Sciences, course P-C1PBB. The administrative application route should not be mistaken for the primary supervisor's home department. Ask which academic unit will manage the final registration and progression record. Directory, application route.

For reputation context, Warwick reports 68th overall in QS 2027. Chemistry reports ninth for UK Chemistry Research Power in REF 2021, with all assessed outputs and impact case studies judged world-leading or internationally excellent. These scopes differ: the latter statement is not a 100% score for every REF component, and neither measure ranks the ERM project or its mentoring. More useful project evidence is the combination of published membrane-interaction research and quantitative cell-mechanics work. University rankings, Chemistry research.

MIBTP describes a four-year training/studentship framework, with quantitative courses, research training away from the home institution and a non-academic PIPS placement. The training outline headed 2025 includes programming, statistics, bioinformatics and masterclasses. It distinguishes a three-month research placement from technical visits that can be shorter. This is useful programme context, not a fixed personal 2027 timetable or proof of the exact stipend months in a future award letter. FAQ, training outline.

Supervisor, Papers and Research Conditions

Complementary Expertise and Supervision

Dixon's official biography identifies her as Professor of Chemistry since 2025, leading membrane-protein biophysics and structural biology with a solution-NMR emphasis. The older “Dr” page heading does not override the current biography. Köster's official staff body identifies him as Associate Professor, with work on membrane mechanics, reconstituted systems, cultured cells and quantitative imaging, and a CAMDU directorship. The two groups provide a credible scientific bridge; the existence of expertise or a facility does not guarantee individual instrument time, ready samples or a dedicated daily trainer. Dixon, Köster.

Dixon's supervision statement promises weekly group monitoring, scheduled meetings at least fortnightly in years 1–3, and advisory-committee meetings twice yearly. It describes personal or suitably qualified training, flexible working patterns, and at least one week's notice for detailed feedback on up to 5,000 words. Year-four scheduled frequency is not listed and should be clarified. These are the supervisor's published intentions, not independently measured student satisfaction or completion outcomes. Supervision statement.

Three Recent Original Contributions

The papers below show relevant capabilities rather than three direct solutions of the proposed interface. Access depths differ and are stated explicitly.

• Lockey et al., JBC 2022, B-cell receptor transmembrane interactions. Dixon is corresponding author. Spectroscopic/biophysical measurements, a membrane interaction assay and computational models support different self- and heterotypic interactions of the receptor subunits. The Discussion distinguishes isolated-domain interactions from hypotheses about whole-receptor assembly and signaling. For this project, the lesson is to combine complementary evidence and avoid converting an interface model into a complete cellular mechanism. The evidence covers the accepted manuscript's study design, selected results and Discussion, not a full 45-page manuscript and supplement review. Accepted manuscript.
• Al-Izzi et al., Physical Review Research 2025, ATP-controlled remodeling. Köster and colleagues connect reconstituted actomyosin observations with motor-binding kinetics and hydrodynamic modeling. The contribution is that chemical energy availability changes the mode of remodeling, not simply its speed. Selected results and Discussion disclose imperfect agreement, failure near the pattern core and imaging limits on simultaneous actin observation. This supports quantitative interpretation of minimal systems; it does not resolve ERM binding or establish a cancer treatment. The evidence covers selected published-PDF design/results/Discussion sections, without full appendices or raw-data reproduction. Published paper.
• Saunders et al., Chemistry–A European Journal 2024, small macrocyclic peptides. Dixon is a coauthor; Michael Shipman is corresponding author. The original article combines a chemical design strategy, multiple macrocycle examples, structural analysis and a representative stability comparison. It shows structure–chemistry collaboration relevant to thinking about molecular probes, but does not demonstrate ERM-selective inhibition or cellular delivery. The evidence covers the primary abstract, introduction and early Results/Discussion; later sections were not recovered. It is not represented as a complete main-text/SI read. Original article.

The lab bibliography helps locate originals, but contains some inconsistent preprint date/DOI lines, so selected-paper identity is grounded in the individual papers. Its 2026 perspective and 2025 review are not counted as original studies. Bibliography.

Funding, Application and Living Costs

What Is Funded, and What Is Still Competitive

UKRI funds a stipend and Home-level fees; Warwick explicitly commits to the international fee difference for successful Warwick MIBTP students. International awards are capped at up to 30% of the overall allocation, not a personal probability or a promise that 30% of applicants succeed. The general four-year framework is a useful funding signal, while the award letter must confirm the individual funded months, conditions and fee waiver. This is a studentship route, not an advertised salary-based employment contract. Call, FAQ.

The 2026/27 UKRI minimum stipend is £21,805/year, with Home-fee support £5,238. These are dated reference rates, not the unpublished 2027 personal stipend. The £5,258 amount specified in MIBTP's application-form instructions is a form entry, not a stipend or a reason to replace the separately published UKRI rate. Visa, healthcare surcharge and travel require an independent arrival budget. UKRI guidance.

Application and China Qualification Route

The MIBTP criteria used here require a relevant first or high 2:1. With a low 2:1 bachelor's degree, a relevant master's or at least three years of relevant post-graduation experience may support eligibility; lower results require exceptional additional experience. Overseas equivalents are assessed, rather than automatically equated with an arbitrary Chinese percentage. Chinese applicants have an explicit international route and Warwick's fee-gap support, subject to competitive selection. MIBTP eligibility, China information.

Warwick's mainland-China postgraduate rules explicitly cover taught and research degrees and restrict consideration to listed institutions. Their ordinary UK 2:1 guide has 70%, 75% and 80% groups, with a fourth listed group at 88% or above for individual consideration. These are not a universal MIBTP high-2:1 threshold. A Master's degree is not documented as an automatic exemption from the institutional list. Applicants outside the listed route should seek a written admissions determination before investing in a full application. China PGR rules.

Complete the ED&I expression-of-interest step and one Warwick application for one advertised project through P-C1PBB, naming the full project and supervisor. The central form requests a proposal, but MIBTP says it is not required and permits a CV or personal statement instead. Referees are contacted after submission; the FAQ asks for two references, at least one academic, allowing a professional second reference when needed. Submit early enough for references to be reviewed before shortlisting. Interviews are planned for late January/early February 2027. No clock time is published for 23 November, so do not invent a 23:59 cutoff. Instructions, FAQ.

The SLS general PhD page gives IELTS 6.5 overall with each component 6.0, while directing funded-DTP applicants to specific DTP guidance. The assigned MIBTP/course offer and accepted test/exemption rules remain controlling; an English-medium Chinese degree does not automatically establish a waiver. Chemistry as the primary supervisor's home does not justify substituting an unrelated course's language band. SLS baseline, English policy.

Budget and Immigration

Warwick's living-cost pages are dated guides, not 2027 housing quotations. One page quotes £1,171/month while retaining an inconsistent annual Master's-budget total; do not use that mismatch as a precise doctoral budget. The June 2026 breakdown uses an October 2025 student survey and distinguishes campus bills from off-campus utilities, travel and lease terms. Obtain actual accommodation prices and allow for deposits and the time before the first stipend. No credible savings estimate follows from the annual stipend alone. International costs, cost components.

The UK Student route provides a positive non-UK framework, subject to an offer, CAS, English and financial evidence. The government guidance cited here lists £558 for the visa application and £776/year for student IHS; actual visa length, part-year charging and future fee changes determine the upfront total. MIBTP's approximate £3,600 combined figure is not a personal quotation. China is not on the ATAS nationality-exemption list, but whether clearance is required depends on the assigned course/subject and CAS; it is not a blanket nationality exclusion. Student visa, IHS, ATAS rules.

Preparation and Career Value

Relevant preparation includes biochemistry, structural or cell biology, biophysics and quantitative interpretation. The advert's method list is a training plan, not proof that applicants must already master every instrument. Evidence of a completed research question, careful controls, a limitation recognized and data explained clearly is more useful than a long technique list. For contact with the supervisors, ask how structural and cell-based work will be divided and what background they expect at entry; no project-specific degree subject list or minimum prior NMR experience was published.

Portable skills could support protein-biophysics research, structural characterization, imaging/assay development or biotechnology R&D. The Royal Society of Biology describes broad bioscience career routes; it does not establish demand or salaries for ERM specialists. Köster's lab self-reports 2025 graduates entering postdoctoral work and medical writing. These examples illustrate possible directions, not an independently audited placement rate. Career routes, lab alumni.

Next Actions and Questions

First verify whether applications are still being accepted. If so, check the Chinese institution/tier route, English evidence and overseas award conditions; contact Ann.Dixon@warwick.ac.uk or D.Koester@warwick.ac.uk about the exact family member and research division, then complete the central instructions and reference process by the published deadline.

At interview, ask which structural states and sample resources are already available, what constitutes a convincing binding result, and what the thesis can still achieve if a high-resolution complex is not tractable. Clarify the daily NMR/imaging mentors, access costs, year-four meetings, committee milestones and how the two groups coordinate responsibility.

Before accepting, obtain the individual stipend schedule, funded duration and international-fee waiver in writing, plus extension-fee rules, final registration unit, housing costs, visa/IHS responsibility and conditional ATAS requirements. These are unresolved personal conditions, not reasons to assume that the advertised international route is unavailable.

Evidence and Sources

The project description and institutional and policy materials establish the application context summarized here. The three recent original papers have the unequal evidence scopes described above; the 2015 study is separate foundational context. Student feedback and an individual award letter are unavailable, and this analysis does not include raw-data reproduction or complete review of the three papers and supplements.

Project, teams and original research

• Ann Dixon official ERM project and supervision
• Current Structural Biology project directory
• Professor Ann Dixon official Chemistry profile
• Darius Koster official Medical School profile
• Koster laboratory current team and alumni
• Koster laboratory original paper and preprint list
• Lockey et al. 2022 BCR transmembrane assembly original
• Al-Izzi et al. 2025 ATP-controlled actomyosin original
• Saunders et al. 2024 macrocyclic peptide original
• Shrivastava et al. 2015 foundational ezrin-actin original

School, training and admissions

• Warwick Chemistry research and REF 2021 scope
• MIBTP 2027 application and institution-specific overseas support
• MIBTP applicant FAQ
• MIBTP training outline (headed 2025)
• Warwick mainland China international admissions route
• Warwick mainland-China postgraduate institution requirements
• Warwick Life Sciences published PhD and English guidance
• Warwick postgraduate English bands
• Warwick official rankings and subject-scope context
• Warwick official university address

Funding, living costs and careers

• Warwick international living-cost guidance
• Warwick student-funding living/course-cost breakdown
• UKRI training grant current stipend
• UK Student visa official route
• UK immigration health surcharge
• ATAS current nationalities and subject rules
• Royal Society of Biology career pathways