Functional redundancy in Candida auris cell surface adhesins crucial for cell-cell interaction and aggregation
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Abstract
Candida auris is an emerging nosocomial fungal pathogen associated with life-threatening invasive disease due to its persistent colonization, high level of transmissibility and multi-drug resistance. Aggregative and non-aggregative growth phenotypes for C. auris strains with different biofilm forming abilities, drug susceptibilities and virulence characteristics have been described. Using comprehensive transcriptional analysis we identified key cell surface adhesins that were highly upregulated in the aggregative phenotype during in vitro and in vivo grown biofilms using a mouse model of catheter infection. Phenotypic and functional evaluations of generated null mutants demonstrated crucial roles for the adhesins Als4112 and Scf1 in mediating cell-cell adherence, coaggregation and biofilm formation. While individual mutants were largely non-aggregative, in combination cells were able to co-adhere and aggregate, as directly demonstrated by measuring cell adhesion forces using single-cell atomic force spectroscopy. This co-adherence indicates their role as complementary adhesins, which despite their limited similarity, may function redundantly to promote cell-cell interaction and biofilm formation. Functional diversity of cell wall proteins may be a form of regulation that provides the aggregative phenotype of C. auris with flexibility and rapid adaptation to the environment, potentially impacting persistence and virulence.
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Als4112 physically interacts with Scf1 through the Flo11 and serine-threonine-rich domains, and together these adhesins mediate cell-cell adherence, aggregation, and biofilm integrity for skin colonization.
“Als4112 physically interacts with Scf1 through the Flo11 and serine–threonine-rich domains, and together these adhesins mediate in cell-cell adherence, aggregation, and biofilm integrity for skin colonization [74].”
From Host–Candida auris interactions in the skin (2026) · cites this paper as [74]
The Results (Scf1 domain organization; cell–cell adherence and aggregation; pages not provided) identify Scf1’s Flo11 domain and serine–threonine-rich region and show that the two adhesins support adherence and aggregation. The Discussion describes complementary Als4112–Scf1 binding, but does not establish that binding occurs through both named domains. The biofilm experiments concern laboratory surfaces and catheters implanted in mice, not skin colonization. (LLM, conf=0.87)
Experimental — accuracy not yet measuredAdhesion to inert surface in UME6HA is essentially triggered by Scf1.
“Adhesion to inert surface was essentially triggered by Scf1.”
From Ume6-dependent pathways of morphogenesis and biofilm formation in <i>Candida auris</i> (2024) · cites this paper as [40]
The Results section on in vitro biofilm formation reports that deleting SCF1 significantly reduced biofilm formation, while deleting ALS4112 did not; the Methods specify polystyrene plates. This supports a role for Scf1 in biofilm formation on an inert surface, but does not establish that Scf1 essentially triggers initial surface adhesion or show this in UME6HA. (LLM, conf=0.84)
Experimental — accuracy not yet measuredScf1 plays a crucial role in adhesion to inert surfaces.
“These data confirm the crucial role of Scf1 in adhesion to inert surfaces as recently described (27, 40).”
From Ume6-dependent pathways of morphogenesis and biofilm formation in <i>Candida auris</i> (2024) · cites this paper as [40]
The Results section on in vitro biofilm formation reports that deleting SCF1 significantly reduced biofilm formation, and the Methods specify that these assays used polystyrene plates. The Discussion also reports sparse Δscf1 biofilms in catheters. These findings support a role for Scf1 in biofilms on inert surfaces, but the paper identifies its adhesion mechanism as cell–cell adherence; it does not establish that Scf1 is crucial for direct adhesion to the inert surface itself. The indexed copy provides no page numbers for these passages. (LLM, conf=0.83)
Experimental — accuracy not yet measuredDeletion of ALS4112 in an aggregative clade I isolate results in an aggregation defect.
“Deletion of ALS4112 in an aggregative clade I isolate resulted in aggregation defect (40).”
From Ume6-dependent pathways of morphogenesis and biofilm formation in <i>Candida auris</i> (2024) · cites this paper as [40]
Scf1 plays a crucial role in adhesion and biofilm formation.
“The crucial role of Scf1 in adhesion and biofilm formation has been recently demonstrated (27, 40).”
From Ume6-dependent pathways of morphogenesis and biofilm formation in <i>Candida auris</i> (2024) · cites this paper as [40]
ALS4 is a member of the Als family, which plays a critical role in the regulation of biofilm formation in Candida auris.
“ALS4 is a member of the Als family, which plays a critical role in the regulation of biofilm formation in C. auris9,13,17,18.”
From The Wor2 phenotypic switching regulator controls biofilm formation in Candida auris (2026) · cites this paper as [18]
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Cha, H., Won, D., Kang, S., Kim, E.-S., Lee, K.-A., Lee, W.-J., Lee, K.-T., & Bahn, Y.-S. (2025) · PLOS Pathogens · doi:10.1371/journal.ppat.1013363 · Cited by 24 · see citing works
Ume6-dependent pathways of morphogenesis and biofilm formation in <i>Candida auris</i>
Louvet, M., Li, J., Brandalise, D., Bachmann, D., Sala de Oyanguren, F., Labes, D., Jacquier, N., Genoud, C., Mucciolo, A., Coste, A. T., et al. (2024) · Microbiology Spectrum · doi:10.1128/spectrum.01531-24 · Cited by 20 · see citing works
Cha, H., Won, D., & Bahn, Y.-S. (2025) · mBio · doi:10.1128/mbio.02475-23 · Cited by 19 · see citing works
Host–Candida auris interactions in the skin
Thangamani, S., Balakumar, A., Datta, A., Bryak, G., & Lionakis, M. S. (2026) · PLOS Pathogens · doi:10.1371/journal.ppat.1014075 · Cited by 3 · see citing works
The Wor2 phenotypic switching regulator controls biofilm formation in Candida auris
Liang, W., Guan, S., Bing, J., Du, H., Zheng, Q., Tao, L., Li, B., Huang, G., & Chu, H. (2026) · npj Biofilms and Microbiomes · doi:10.1038/s41522-026-01043-2
- Authors
- Wang, T. W., Sofras, D., Montelongo-Jauregui, D., Paiva, T. O., Carolus, H., Dufrêne, Y. F., Alfaifi, A. A., McCracken, C., Bruno, V. M., Van Dijck, P., & Jabra-Rizk, M. A.
- Affiliations
- University of Maryland, Baltimore (US)
- KU Leuven (BE)
- UCLouvain (BE)
- ORCID
- Venue
- Nature Communications
- Published
- 2024-10-25
- Volume
- 15
- Issue
- 1
- Pages
- 9212-9212
- ISSN
- 2041-1723 (ISSN-L)
- PMC
- PMC11511831
- OpenAlex
- W4403769442
- Cited by
- 47
- References
- 11
- Citations by year
- 2026: 27 · 2025: 16 · 2024: 4
- FWCI
- 16.26
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Nature Communications (publishedVersion, cc-by-nc-nd)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
- Research Square (acceptedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Lirias (KU Leuven) (submittedVersion, cc-by-nc-nd)
- PubMed Central (submittedVersion, cc-by-nc-nd)
- PubMed Central (submittedVersion, cc-by)
- RePEc: Research Papers in Economics (submittedVersion)
- Digital Access to Libraries (submittedVersion, other-oa)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Lirias (submittedVersion, cc-by)
- Lirias (submittedVersion, cc-by-nc-nd)
- Funders
- U.S. Department of Health and Human Services (R01AI130170)
- Fonds De La Recherche Scientifique - FNRS
- Fonds Wetenschappelijk Onderzoek (W000921N)
- Vlaamse regering
- National Institutes of Health
- National Institute of Allergy and Infectious Diseases (R01AI130170, U19AI110820, AI-110820)
- Topics
- Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
- Health Sciences › Medicine › Epidemiology › Fungal Infections and Studies
- Keywords
- Candida auris, cell surface adhesins, functional redundancy, cell aggregation, cell-cell adhesion, biofilm formation, cell wall proteins, co-aggregation, catheter-related infection, knockout mutants, cell adhesion force, atomic force spectroscopy, transcriptional regulation, fungal virulence, nosocomial fungal infections
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