spp1 (SPAC6B12.10c)

Gene Standard Namespp1 Characterisation Statuspublished
Systematic IDSPAC6B12.10c Feature Typeprotein coding
Synonymspri1 Name Description
ProductDNA primase catalytic subunit Spp1 Product Size454aa, 52.01 kDa
Genomic Location Chromosome I, 2430742-2428976 (1767nt); CDS:2430617-2429169 (1449nt)

Ensembl Gene Location
GO Molecular Function

GO Slim Terms

DNA replication

Term NameCount
DNA primase activity4
Annotation ExtensionEvidenceWith/FromReference
metal ion binding743
Annotation ExtensionEvidenceWith/FromReference
GO Biological Process

GO Slim Terms

DNA replication

GO Cellular Component
Fission Yeast Phenotype Ontology
Gene Deletion Viability: Inviable

Single-allele Phenotypes

Population Phenotype

Term NameGenotypesCount
decreased vegetative cell population growthspp1-14588
inviable vegetative cell populationspp1-211443
loss of viability at high temperaturespp1-2142
normal vegetative cell population growthspp1-21763

Cell Phenotype

Term NameGenotypesCount
abnormal mitotic cell cyclespp1Δ852
abnormal mitotic cell cycle arrest with replicated DNAspp1Δ40
abnormal nuclear morphology during vegetative growthspp1-2169
abolished protein binding102
affecting pol1 and spp1spp1-14
affecting pol1 and spp1spp1-21
affecting pol1 and spp1spp1-4
cell cycle arrest in mitotic S phasespp1-1412
decreased protein binding71
affecting pol1 and spp2spp1-14
affecting pol1 and spp2spp1-4
affecting pol1 and spp2spp1-21
decreased protein level during vegetative growth100
affecting spp1spp1-21
affecting spp1spp1-14
affecting spp1spp1-4
decreased response to mitotic G2 DNA damage checkpoint signalingspp1-211
elongated telomeresspp1-9170
increased protein kinase activity13
affecting cds1spp1-14
affecting cds1spp1-4
affecting cds1spp1-21
inviable after spore germination with elongated germ tubespp1Δ164
inviable after spore germination, multiple cell divisions, elongated cellspp1Δ115
inviable after spore germination, single or double cell divisionspp1Δ105
inviable elongated mononucleate vegetative cellspp1-443
inviable elongated vegetative cellspp1Δ403
normal chromatin silencing at telomerespp1-910
septation following abnormal mitotic chromosome segregationspp1-4137
Target Of
FYPO affected by mutation in cdc23 MCM-associated protein Mcm10
FYPO affected by mutation in cdc45 DNA replication pre-initiation complex subunit Cdc45
FYPO affected by mutation in pol1 DNA polymerase alpha catalytic subunit
FYPO affected by mutation in spp1 DNA primase catalytic subunit Spp1
FYPO affected by mutation in spp2 DNA primase large subunit Spp2
Ensembl transcript structure with UTRs, exons and introns

Transcript Structure

Region Coordinates Reference
Exons2430742..2430544, 2430459..2428976
5' UTR2430742..2430618PMID:21511999
CDS2430617..2430544, 2430459..2429169
3' UTR2429168..2428976PMID:21511999
Protein Features

Graphical View

Ensembl protein image with mapped locations of structural domains

Protein Families and Domains

Feature ID Database InterPro Description Start End Count
PF01896 Pfam IPR002755 DNA primase, small subunit 130 363 1
PTHR10536 HMMPANTHER IPR014052 DNA primase, small subunit, eukaryotic/archaeal 5 454 1
1v33A01 Gene3D 332 390 1
1v33A01 Gene3D 30 212 1
SSF56747 SuperFamily 33 388 1
TIGR00335 tigrfam IPR014052 DNA primase, small subunit, eukaryotic/archaeal 36 383 1

View domain organization at Pfam

Protein Properties

Ave. residue weight 114.56 Da
Charge 3.50
Codon Adpatation Index 0.40
Isoelectric point 6.91
Molecular weight 52.01 kDa
Number of residues 454
Gene Expression

Qualitative Gene Expression

protein levelconstant during GO:0000278Western blot evidencePMID:11160827

Quantitative Gene Expression

Protein Level

Molecules/Cell (average)ExtensionConditionScaleEvidenceReference
4129during GO:0000080PECO:0000005,
single cellmass spectrometry evidencePMID:24763107
3734during GO:0000084PECO:0000005,
single cellmass spectrometry evidencePMID:24763107
4074during GO:0000085PECO:0000005,
single cellmass spectrometry evidencePMID:24763107
4042during GO:0000087PECO:0000005,
single cellmass spectrometry evidencePMID:24763107
701.69during GO:0072690PECO:0000014,
population wideexperimental evidencePMID:23101633
3820during GO:0072690PECO:0000005,
single cellmass spectrometry evidencePMID:24763107

RNA Level

Molecules/Cell (average)ExtensionConditionScaleEvidenceReference
2.2during GO:0072690PECO:0000014,
population wideexperimental evidencePMID:23101633
0.63during cell quiescence following G1 arrest due to nitrogen limitationPECO:0000127,
population wideexperimental evidencePMID:23101633
Taxonomic Conservation
predominantly single copy (one to one)3090
conserved in fungi4604
conserved in eukaryotes4514
conserved in bacteria1000
conserved in metazoa3421
conserved in vertebrates3396
conserved in archaea238

Manually curated orthologous groups


Orthologs in Compara

Physical Interactions

Source: BioGRID

View all interactions in esyN
View the HCPIN interactions in esyN

Gene Product Evidence Reference
affinity captured bypir2zf-C2H2 type zinc finger protein, implicated in RNAi (predicted) Affinity Capture-MSPMID:24713849
affinity captured bypol1DNA polymerase alpha catalytic subunit Affinity Capture-WesternPMID:11027257
affinity captured byspb70DNA polymerase alpha B-subunit Affinity Capture-WesternPMID:15314153
Genetic Interactions

Source: BioGRID

View these interactions in esyN

Gene Product Evidence Reference
rescued by overexpression ofalp14TOG/XMAP14 family protein Alp14 Dosage RescuePMID:15507118
phenotype enhanced bychk1Chk1 protein kinase Phenotypic EnhancementPMID:11160827
synthetically rescuescrb2DNA repair protein Rad9 homolog Crb2 Synthetic RescuePMID:12589755
synthetic lethal withtrt1telomerase reverse transcriptase 1 protein Trt1 Synthetic LethalityPMID:12697806
External References
Database Identifier Description
NBRP SPAC6B12.10c Fission yeast strain database, National BioResource Project (Japan)
YOGY SPAC6B12.10c Retrieval of eukaryotic orthologs (Bähler Lab)
BioGrid SPAC6B12.10c BioGRID Interaction Datasets
Expression Viewer SPAC6B12.10c Cell Cycle Expression Profile (Bähler Lab)
Expression Viewer SPAC6B12.10c Meiosis/Sporulation Expression Profies (Bähler Lab)
Expression Viewer SPAC6B12.10c Pheromone response/mating expression profiles (Bähler Lab)
Expression Viewer SPAC6B12.10c Environmental stress expression profiles (Bähler Lab)
Pomb(A) SPAC6B12.10c Polyadenylation Viewer (Gullerova lab)
pombeTV SPAC6B12.10c Transcriptome Viewer (Bähler Lab)
GEO SPAC6B12.10c GEO profiles
PInt SPAC6B12.10c Protein-Protein Interaction Predictor (Bähler Lab)
PeptideAtlas SPAC6B12.10c Peptides identified in tandem mass spectrometry proteomics experiments
SYSGRO SPAC6B12.10c Fission yeast phenotypic data & analysis
Cyclebase SPAC6B12.10c.1 Cell Cycle Data
SPD / RIKEN23/23C12Orfeome Localization Data
UniProtKB/SwissProtO14215DNA primase small subunit
ModBaseO14215Database of comparative protein structure models
STRINGO14215Network display of known and predicted interactions and functional associations
RefSeq PeptideNP_593765DNA primase catalytic subunit Spp1
RefSeq mRNANM_001019195972h- DNA primase catalytic subunit Spp1 (spp1), mRNA
European Nucleotide ArchiveCU329670ENA EMBL mapping
European Nucleotide ArchiveCAB11078ENA Protein Mapping
European Nucleotide ArchiveCAB11078.1ENA Protein Mapping
UniParcUPI00001321B1UniProt Archive

Literature for spp1

Search: Europe PMC or PubMed

Release Version: PomBase:28_55 - 09 Sep 2015