PomBase home

protein coding gene - fus1 (SPAC20G4.02c) - formin Fus1

Gene summary

Standard name
fus1
Systematic ID
SPAC20G4.02c
Product
formin Fus1
Organism
Schizosaccharomyces pombe (fission yeast)
UniProt ID
Q10719
ORFeome ID
30/30F08
Characterisation status
biological role published
Feature type
mRNA gene
Genomic location
chromosome I: 4813111..4817786 reverse strand

Annotation

Disease association

MONDO:0007424 - autosomal dominant nonsyndromic hearing loss 1

References:

MONDO:0014714 - progressive microcephaly-seizures-cortical blindness-developmental delay syndrome

References:

GO biological process

GO:0000747 - conjugation with cellular fusion

References:

GO:0000755 - cytogamy

References:

GO:1904600 - mating projection actin fusion focus assembly

References:

GO cellular component

GO:0032153 - cell division site

References:

GO:0005737 - cytoplasm

References:

GO:0005829 - cytosol

References:

GO:0005937 - mating projection

References:

GO:1990819 - mating projection actin fusion focus

References:

GO:0043332 - mating projection tip

References:

GO molecular function

GO:0051015 - actin filament binding

References:

GO:0140693 - molecular condensate scaffold activity

References:

GO:0140489 - molecular template activity

References:

GO:0031267 - small GTPase binding

References:

Modification

MOD:00046 - O-phospho-L-serine

References:

MOD:00047 - O-phospho-L-threonine

References:

MOD:01148 - ubiquitinylated lysine

References:

Multi-locus phenotype

FYPO:0000413 - abolished cell fusion during mating

References:

Genotypes:

FYPO:0003363 - abolished cytogamy

References:

Genotypes:

FYPO:0007689 - normal cell growth polarization

References:

Genotypes:

FYPO:0006500 - premature cell wall disassembly at cell fusion site

References:

Genotypes:

FYPO:0006386 - protein abnormally dispersed at shmoo tip

References:

Genotypes:

Qualitative gene expression

PomGeneEx:0000018 - protein level increased

References:

PomGeneEx:0000011 - RNA level increased

References:

PomGeneEx:0000014 - RNA present

References:

Quantitative gene expression

PBO:0011963 - RNA level

References:

Single locus phenotype

FYPO:0006108 - abnormal actin fusion focus assembly

References:

Genotypes:

FYPO:0000031 - abnormal mating

References:

Genotypes:

FYPO:0005989 - abnormal protein localization during mating

References:

Genotypes:

FYPO:0006503 - abnormal protein localization to actin fusion focus

References:

Genotypes:

FYPO:0006098 - abnormal protein localization to cytoplasm

References:

Genotypes:

FYPO:0005503 - abnormally monopolar protein localization to cell tip

References:

Genotypes:

FYPO:0004804 - abolished actin fusion focus assembly

References:

Genotypes:

FYPO:0000413 - abolished cell fusion during mating

References:

Genotypes:

FYPO:0003363 - abolished cytogamy

References:

Genotypes:

FYPO:0002044 - abolished premeiotic DNA replication

References:

Genotypes:

FYPO:0010020 - abolished protein localization to P-bodies during mating

References:

Genotypes:

FYPO:0006505 - abolished protein localization to shmoo tip

References:

Genotypes:

FYPO:0008002 - cell lysis during mating

References:

Genotypes:

FYPO:0009073 - decreased cell population growth on lysine nitrogen source

References:

Genotypes:

FYPO:0000303 - decreased conjugation frequency

References:

Genotypes:

FYPO:0007874 - decreased exocytosis at shmoo tip

References:

Genotypes:

FYPO:0000708 - decreased mating efficiency

References:

Genotypes:

FYPO:0007876 - decreased plasma membrane waviness at shmoo tip

References:

Genotypes:

FYPO:0007096 - decreased protein localization to actin fusion focus

References:

Genotypes:

FYPO:0006587 - decreased protein localization to shmoo tip membrane

References:

Genotypes:

FYPO:0006589 - decreased protein localization to shmoo tip membrane, with protein distributed in plasma membrane

References:

Genotypes:

FYPO:0004806 - incomplete cell wall disassembly at cell fusion site

References:

Genotypes:

FYPO:0007094 - increased duration of cell fusion during mating

References:

Genotypes:

FYPO:0003532 - increased monopolar index

References:

Genotypes:

FYPO:0006081 - increased protein localization to actin cortical patch

References:

Genotypes:

FYPO:0007095 - increased protein localization to actin fusion focus

References:

Genotypes:

FYPO:0003482 - increased punctate cytoplasmic protein localization

References:

Genotypes:

FYPO:0003364 - mislocalized nucleus during mating

References:

Genotypes:

FYPO:0001366 - normal actin cytoskeleton organization

References:

Genotypes:

FYPO:0003135 - normal agglutination

References:

Genotypes:

FYPO:0008393 - normal cell fusion during mating

References:

Genotypes:

FYPO:0001147 - normal mating efficiency

References:

Genotypes:

FYPO:0007147 - normal Mei2 nuclear dot formation

References:

Genotypes:

FYPO:0003626 - normal protein localization to shmoo tip

References:

Genotypes:

FYPO:0000573 - normal shmoo formation

References:

Genotypes:

FYPO:0000590 - normal sporulation

References:

Genotypes:

FYPO:0006386 - protein abnormally dispersed at shmoo tip

References:

Genotypes:

FYPO:0003527 - protein mislocalized to cell tip

References:

Genotypes:

FYPO:0009031 - resistance to bleomycin

References:

Genotypes:

FYPO:0000067 - resistance to brefeldin A

References:

Genotypes:

FYPO:0000763 - resistance to cadmium

References:

Genotypes:

FYPO:0009085 - resistance to lithium chloride and sodium dodecyl sulfate

References:

Genotypes:

FYPO:0009087 - resistance to magnesium chloride and sodium dodecyl sulfate

References:

Genotypes:

FYPO:0009043 - resistance to potassium chloride and sodium dodecyl sulfate

References:

Genotypes:

FYPO:0007931 - sensitive to egtazic acid

References:

Genotypes:

FYPO:0000842 - sensitive to ethanol during vegetative growth

References:

Genotypes:

FYPO:0000111 - sensitive to rapamycin

References:

Genotypes:

FYPO:0000091 - sensitive to thiabendazole

References:

Genotypes:

FYPO:0007658 - shmoo with flat tip

References:

Genotypes:

FYPO:0006672 - transient cell fusion during mating followed by meiotic cell cycle entry and sporulation

References:

Genotypes:

FYPO:0002060 - viable vegetative cell population

References:

Genotypes:

FYPO:0002177 - viable vegetative cell with normal cell morphology

References:

Genotypes:

FYPO:0007683 - wide actin fusion focus

References:

Genotypes:

Taxonomic conservation

PBO:0011065 - conserved in eukaryotes

PBO:0011071 - conserved in eukaryotes only

PBO:0011064 - conserved in fungi

PBO:0011069 - conserved in metazoa

PBO:0011070 - conserved in vertebrates

Protein features

IDNameInterPro nameDB name
PF06371Drf_GBDGTPase-bdPFAM
PF02181FH2FH2_ForminPFAM
PS51232GBD_FH3GBD/FH3_domPROSITE_PROFILES
PS51444FH2FH2_ForminPROSITE_PROFILES
SM01140Drf_GBD_2GTPase-bdSMART
SM00498it6_sourceFH2_ForminSMART
G3DSA:1.25.10.10:FF:000997FUNFAM
SSF48371ARM repeatARM-type_foldSUPERFAMILY
SSF101447Formin homology 2 domain (FH2 domain)SUPERFAMILY
G3DSA:1.20.58.2220Formin, FH2 domainFH2_Formin_sfGENE3D
G3DSA:1.25.10.10ARM-likeGENE3D
G3DSA:6.10.30.50GENE3D
PTHR47102PROTEIN BNI1Actin_filament_regulatorPANTHER
CoilCoilCOILS

Orthologs

References / Literature

PMID:41335110 - High-resolution mapping of the actin fusion focus reveals myosin V-dependent formin transport for aster formation.
Thomas V et al. J Cell Biol 2026 Feb 02;225(2)
PMID:39705284 - Proteomic and phosphoproteomic analyses reveal that TORC1 is reactivated by pheromone signaling during sexual reproduction in fission yeast.
Bérard M et al. PLoS Biol 2024 Dec 20;22(12):e3002963
GO_REF:0000051 - S. pombe keyword mapping
PMID:31495586 - Capping Protein Insulates Arp2/3-Assembled Actin Patches from Formins.
Billault-Chaumartin I et al. Curr Biol 2019 Oct 07;29(19):3165-3176.e6
PMID:17032641 - Global roles of Ste11p, cell type, and pheromone in the control of gene expression during early sexual differentiation in fission yeast.
Mata J et al. Proc Natl Acad Sci U S A 2006 Oct 17;103(42):15517-22
PMID:29259000 - Genes Important for Schizosaccharomyces pombe Meiosis Identified Through a Functional Genomics Screen.
Blyth J et al. Genetics 2018 Feb;208(2):589-603
PMID:34382996 - Ultrastructural plasma membrane asymmetries in tension and curvature promote yeast cell fusion.
Muriel O et al. J Cell Biol 2021 Oct 04;220(10)
PMID:24514900 - Membrane organization and cell fusion during mating in fission yeast requires multipass membrane protein Prm1.
Curto MÁ et al. Genetics 2014 Apr;196(4):1059-76
PMID:36202103 - Condensation of the fusion focus by the intrinsically disordered region of the formin Fus1 is essential for cell-cell fusion.
Billault-Chaumartin I et al. Curr Biol 2022 Nov 07;32(21):4752-4761.e10
PMID:41298081 - Gamete fusion triggers cytosolic functions and P-body recruitment of the RNA-binding protein Mei2 to drive fission yeast zygotic development.
Araoyinbo A et al. Genes Dev 2025 Nov 26;
PMID:20473289 - Analysis of a genome-wide set of gene deletions in the fission yeast Schizosaccharomyces pombe.
Kim DU et al. Nat Biotechnol 2010 Jun;28(6):617-623
PMID:7791776 - Characterization of fus1 of Schizosaccharomyces pombe: a developmentally controlled function needed for conjugation.
Petersen J et al. Mol Cell Biol 1995 Jul;15(7):3697-707
PMID:23697806 - A genome-wide resource of cell cycle and cell shape genes of fission yeast.
Hayles J et al. Open Biol 2013 May 22;3(5):130053
PMID:9606213 - FH3, a domain found in formins, targets the fission yeast formin Fus1 to the projection tip during conjugation.
Petersen J et al. J Cell Biol 1998 Jun 01;141(5):1217-28
PMID:25375137 - Systematic analysis of the role of RNA-binding proteins in the regulation of RNA stability.
Hasan A et al. PLoS Genet 2014 Nov;10(11):e1004684
PMID:37970674 - SUMOylation regulates Lem2 function in centromere clustering and silencing.
Strachan J et al. J Cell Sci 2023 Dec 01;136(23)
PMID:25825517 - A formin-nucleated actin aster concentrates cell wall hydrolases for cell fusion in fission yeast.
Dudin O et al. J Cell Biol 2015 Mar 30;208(7):897-911
PMID:27798845 - Spatial focalization of pheromone/MAPK signaling triggers commitment to cell-cell fusion.
Dudin O et al. Genes Dev 2016 Oct 01;30(19):2226-2239
GO_REF:0000033 - Annotation inferences using phylogenetic trees
PMID:22681890 - Hierarchical modularity and the evolution of genetic interactomes across species.
Ryan CJ et al. Mol Cell 2012 Jun 08;46(5):691-704
PMID:29453312 - Inhibition of Ras activity coordinates cell fusion with cell-cell contact during yeast mating.
Merlini L et al. J Cell Biol 2018 Apr 02;217(4):1467-1483
PB_REF:0000006 - Disease associations from Monarch via human-pombe orthologs
PMID:33823663 - A TOR (target of rapamycin) and nutritional phosphoproteome of fission yeast reveals novel targets in networks conserved in humans.
Halova L et al. Open Biol 2021 Apr;11(4):200405
PMID:9614176 - Cyclin B proteolysis and the cyclin-dependent kinase inhibitor rum1p are required for pheromone-induced G1 arrest in fission yeast.
Stern B et al. Mol Biol Cell 1998 Jun;9(6):1309-21
PMID:29134248 - The ancient claudin Dni2 facilitates yeast cell fusion by compartmentalizing Dni1 into a membrane subdomain.
Curto MÁ et al. Cell Mol Life Sci 2018 May;75(9):1687-1706
PMID:37787768 - Broad functional profiling of fission yeast proteins using phenomics and machine learning.
Rodríguez-López M et al. Elife 2023 Oct 03;12
PMID:4472733 - Premeiotic DNA synthesis in fission yeast.
Egel R et al. Exp Cell Res 1974 Sep;88(1):127-34
PMID:33313903 - Ribosome profiling reveals ribosome stalling on tryptophan codons and ribosome queuing upon oxidative stress in fission yeast.
Rubio A et al. Nucleic Acids Res 2021 Jan 11;49(1):383-399
PMID:9742398 - Conjugation in S. pombe: identification of a microtubule-organising centre, a requirement for microtubules and a role for Mad2.
Petersen J et al. Curr Biol 1998 Aug 27;8(17):963-6
PMID:21148300 - Actin cables and the exocyst form two independent morphogenesis pathways in the fission yeast.
Bendezú FO et al. Mol Biol Cell 2011 Jan 01;22(1):44-53
PMID:12161753 - The transcriptional program of meiosis and sporulation in fission yeast.
Mata J et al. Nat Genet 2002 Sep;32(1):143-7
GO_REF:0000002 - Comments
PMID:28410370 - A systematic screen for morphological abnormalities during fission yeast sexual reproduction identifies a mechanism of actin aster formation for cell fusion.
Dudin O et al. PLoS Genet 2017 Apr;13(4):e1006721
PMID:16598689 - The Schizosaccharomyces pombe cfr1+ gene participates in mating through a new pathway that is independent of fus1+.
Cartagena-Lirola H et al. Yeast 2006 Apr 15;23(5):375-88
PMID:27984744 - Survival in Quiescence Requires the Euchromatic Deployment of Clr4/SUV39H by Argonaute-Associated Small RNAs.
Joh RI et al. Mol Cell 2016 Dec 15;64(6):1088-1101
PMID:30089908 - Gamete fusion triggers bipartite transcription factor assembly to block re-fertilization.
Vještica A et al. Nature 2018 Aug;560(7718):397-400
PMID:28218250 - Chromatin remodeller Fun30 Fft3 induces nucleosome disassembly to facilitate RNA polymerase II elongation.
Lee J et al. Nat Commun 2017 Feb 20;8:14527
PMID:23101633 - Quantitative analysis of fission yeast transcriptomes and proteomes in proliferating and quiescent cells.
Marguerat S et al. Cell 2012 Oct 26;151(3):671-83
PMID:21504829 - Yeast SREBP cleavage activation requires the Golgi Dsc E3 ligase complex.
Stewart EV et al. Mol Cell 2011 Apr 22;42(2):160-71
PMID:16823372 - ORFeome cloning and global analysis of protein localization in the fission yeast Schizosaccharomyces pombe.
Matsuyama A et al. Nat Biotechnol 2006 Jul;24(7):841-7
PMID:11952834 - Tropomyosin is required for the cell fusion process during conjugation in fission yeast.
Kurahashi H et al. Genes Cells 2002 Apr;7(4):375-84
PMID:21511999 - Comparative functional genomics of the fission yeasts.
Rhind N et al. Science 2011 May 20;332(6032):930-6
PMID:19627505 - The tetraspan protein Dni1p is required for correct membrane organization and cell wall remodelling during mating in Schizosaccharomyces pombe.
Clemente-Ramos JA et al. Mol Microbiol 2009 Aug;73(4):695-709
PMID:26098123 - Promoter nucleosome dynamics regulated by signalling through the CTD code.
Materne P et al. Elife 2015 Jun 22;4:e09008
PMID:35673994 - Actin assembly requirements of the formin Fus1 to build the fusion focus.
Billault-Chaumartin I et al. J Cell Sci 2022 Jul 01;135(13)