FB2026_02 , released June 18, 2026
Gene: Dmel\Gyc88E
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General Information
Symbol
Dmel\Gyc88E
Species
D. melanogaster
Name
Guanylyl cyclase at 88E
Annotation Symbol
CG4154
Feature Type
FlyBase ID
FBgn0038295
Gene Model Status
Stock Availability
Enzyme Name (EC)
guanylate cyclase (4.6.1.2)
Gene Summary
Guanylyl cyclase at 88E (Gyc88E) encodes an atypical soluble guanylyl cyclase. It forms heterodimers with the products of Gyc89Da or Gyc89Db to form an oxygen-sensitive soluble guanylyl cyclase, which likely functions as a neuronal oxygen detector, activated at reduced oxygen levels. [Date last reviewed: 2019-03-07] (FlyBase Gene Snapshot)
Also Known As

Gyc-88E

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
3-56
RefSeq locus
NT_033777 REGION:15150375..15191242
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (19 terms)
Molecular Function (11 terms)
Terms Based on Experimental Evidence (10 terms)
CV Term
Evidence
References
inferred from direct assay
inferred from physical interaction with UniProtKB:Q9VEU5
inferred from physical interaction with UniProtKB:Q9VEU6
inferred from direct assay
inferred from direct assay
enables heme binding
inferred from direct assay
inferred from direct assay
inferred from direct assay
inferred from direct assay
inferred from physical interaction with UniProtKB:Q9VEU5
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN002902243
inferred from electronic annotation with InterPro:IPR011645
enables heme binding
inferred from electronic annotation with InterPro:IPR011644, InterPro:IPR038158
inferred from biological aspect of ancestor with PANTHER:PTN002902310
inferred from biological aspect of ancestor with PANTHER:PTN002902310
Biological Process (7 terms)
Terms Based on Experimental Evidence (3 terms)
CV Term
Evidence
References
inferred from direct assay
inferred from mutant phenotype
inferred from direct assay
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
Cellular Component (1 term)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN002902243
inferred by curator from GO:0004383
Protein Family (UniProt)
Belongs to the adenylyl cyclase class-4/guanylyl cyclase family. (Q8INF0)
Catalytic Activity (EC/Rhea)
guanylate cyclase activity
GTP = 3',5'-cyclic GMP + diphosphate (4.6.1.2)
RHEA 13665: GTPase activity
RHEA 19669:
Summaries
Gene Snapshot
Guanylyl cyclase at 88E (Gyc88E) encodes an atypical soluble guanylyl cyclase. It forms heterodimers with the products of Gyc89Da or Gyc89Db to form an oxygen-sensitive soluble guanylyl cyclase, which likely functions as a neuronal oxygen detector, activated at reduced oxygen levels. [Date last reviewed: 2019-03-07]
Gene Group (FlyBase)
SOLUBLE GUANYLATE CYCLASES ATYPICAL -
Atypical soluble guanylate cyclases are enzymes that synthesize cyclic GMP. These enzymes are activated in response to hypoxia, however they are only slightly activated by or are insensitive to nitric oxide. (Adapted from FBrf0179844).
UNCLASSIFIED GTPASES -
This group comprises GTPases that do not classify under other groups in FlyBase.
Protein Function (UniProtKB)
Heterodimers with Gyc-89Da and Gyc-89Db are activated in response to changing oxygen concentrations, alerting flies to hypoxic environments. Under normal oxygen concentrations, oxygen binds to the heme group and results in low levels of guanylyl cyclase activity. When exposed to reduced oxygen concentrations, the oxygen dissociates from the heme group resulting in activation of the enzyme.
(UniProt, Q8INF0)
Gene Model and Products
Number of Transcripts
3
Number of Unique Polypeptides
2

Please see the JBrowse view of Dmel\Gyc88E for information on other features

To submit a correction to a gene model please use the Contact FlyBase form

Protein Domains (via Pfam)
Isoform displayed:
Pfam protein domains
InterPro name
classification
start
end
Protein Domains (via SMART)
Isoform displayed:
SMART protein domains
InterPro name
classification
start
end
Structure
Protein 3D structure   (Predicted by AlphaFold)   (AlphaFold entry Q8INF0)

If you don't see a structure in the viewer, refresh your browser.
Model Confidence:
  • Very high (pLDDT > 90)
  • Confident (90 > pLDDT > 70)
  • Low (70 > pLDDT > 50)
  • Very low (pLDDT < 50)

AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Some regions with low pLDDT may be unstructured in isolation.

Experimentally Determined Structures
Crossreferences
Comments on Gene Model

Low-frequency RNA-Seq exon junction(s) not annotated.

Gene model reviewed during 5.47

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0110961
4824
1097
FBtr0306245
4049
1097
FBtr0334926
4028
1090
Additional Transcript Data and Comments
Reported size (kB)
Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0110261
121.2
1097
7.29
FBpp0297355
121.2
1097
7.29
FBpp0306946
120.4
1090
7.14
Polypeptides with Identical Sequences

The group(s) of polypeptides indicated below share identical sequence to each other.

1097 aa isoforms: Gyc88E-PD, Gyc88E-PE
Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Subunit Structure (UniProtKB)

Homodimer, and heterodimer; with Gyc-89Db and Gyc-89Da, in the presence of magnesium or manganese.

(UniProt, Q8INF0)
Linkouts
Sequences Consistent with the Gene Model
Mapped Features

Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\Gyc88E using the Feature Mapper tool.

External Data
Crossreferences
Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
Linkouts
Expression Data
Testis-specificity index

The testis specificity index was calculated from modENCODE tissue expression data by Vedelek et al., 2018 to indicate the degree of testis enrichment compared to other tissues. Scores range from -2.52 (underrepresented) to 5.2 (very high testis bias).

-0.67

Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
northern blot
Stage
Tissue/Position (including subcellular localization)
Reference
RT-PCR
Stage
Tissue/Position (including subcellular localization)
Reference
organism

Comment: both Gyc88E-RA and Gyc88E-RC transcripts

Additional Descriptive Data

Gyc88E transcript is expressed at a higher level in adults than in larvae. Both Gyc88E-RA (Gyc-88E-S) and Gyc88E-RC (Gyc-88E-L) are expressed at both stages. Embryonic expression is seen the brain, and in a segmentally repeated pattern in the ventral nerve cord starting at stage 15 or 16. Expression is observed in several peripheral neurons that innervate trachea, basiconical sensilla and the sensory cones in the posterior segmentsa; embryonic PNS expression colocalizes with that of Gyc-89Db. In the third instar larva, expression is observed in scattered cells throughout the brain, but most prominently in a small cluster of cells in the anterior medial region of each brain lobe. Larval expression in the ventral ganglion is observed in scattered cells located laterally and at the midline.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\Gyc88E in JBrowse
RNA-Seq by Region - Search RNA-Seq expression levels by exon or genomic region
Reference
See Gelbart and Emmert, 2013 for analysis details and data files for all genes.
Developmental Proteome: Life Cycle
Developmental Proteome: Embryogenesis
External Data and Images
Linkouts
DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 10 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 4 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Gyc88E
Transgenic constructs containing regulatory region of Gyc88E
Aberrations (Deficiencies and Duplications) ( 0 )
Inferred from experimentation ( 0 )
Inferred from location ( 8 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (23)
3 of 14
Yes
No
1  
3 of 14
Yes
No
3 of 14
Yes
No
2 of 14
No
No
2 of 14
No
No
1  
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1  
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
52  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (23)
4 of 14
Yes
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1  
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Mus musculus (laboratory mouse) (24)
5 of 14
Yes
No
3 of 14
No
No
3 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (11)
4 of 13
Yes
Yes
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
Yes
Danio rerio (Zebrafish) (30)
4 of 14
Yes
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (39)
11 of 14
Yes
Yes
4 of 14
No
No
3 of 14
No
No
3 of 14
No
Yes
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Anopheles gambiae (African malaria mosquito) (25)
12 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (0)
Saccharomyces cerevisiae (Brewer's yeast) (1)
1 of 13
Yes
No
Schizosaccharomyces pombe (Fission yeast) (1)
1 of 12
Yes
No
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Gyc88E. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (27)
5 of 13
5 of 13
5 of 13
5 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
3 of 13
2 of 13
2 of 13
2 of 13
2 of 13
2 of 13
2 of 13
1 of 13
1 of 13
Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 1 )
    Human Ortholog
    Disease
    Evidence
    References
    Modifiers Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Interaction
    References
    Disease Associations of Human Orthologs (via DIOPT v9.1 and OMIM)
    Note that ortholog calls supported by only 1 or 2 algorithms (DIOPT score < 3) are not shown.
    Functional Complementation Data
    Functional complementation data is computed by FlyBase using a combination of the orthology data obtained from DIOPT and OrthoDB and the allele-level genetic interaction data curated from the literature.
    Interactions
    Summary of Physical Interactions
    Interaction Browsers

    Please see the Physical Interaction reports below for full details
    protein-protein
    Physical Interaction
    Assay
    References
    Summary of Genetic Interactions
    Interaction Browsers
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    External Data
    Subunit Structure (UniProtKB)
    Homodimer, and heterodimer; with Gyc-89Db and Gyc-89Da, in the presence of magnesium or manganese.
    (UniProt, Q8INF0 )
    Linkouts
    DroID - A comprehensive database of gene and protein interactions.
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    KEGG Metabolic Pathways - A collection of manually drawn metabolic pathway maps representing knowledge of molecular interaction, reaction and relation networks.
    External Data
    Linkouts
    KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    3R
    Recombination map
    3-56
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    88E2-88E2
    Limits computationally determined from genome sequence between P{EP}CG33967EP666 and P{lacW}Hsc70-4L3929
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (12)
    Genomic Clones (19)
    cDNA Clones (20)
     

    Please Note This section lists cDNAs and ESTs that fall within the genomic extent of the gene model, which may include cDNAs and ESTs of genes within introns, or of overlapping genes. Please see JBrowse for alignment of the cDNAs and ESTs to the gene model.

    cDNA clones, fully sequenced
    BDGP DGC clones
      Other clones
      Drosophila Genomics Resource Center cDNA clones

      For each fully sequenced cDNA the DGRC maintains various forms of the cDNA (e.g tagged or untagged) in several different host vectors for subsequent cloning and expression in Drosophila and Drosophila cell lines.

      cDNA Clones, End Sequenced (ESTs)
      BDGP DGC clones
      RNAi and Array Information
      Linkouts
      DRSC - Results frm RNAi screens
      Antibody Information
      Laboratory Generated Antibodies
       
      Commercially Available Antibodies
       
      Cell Line Information
      Publicly Available Cell Lines
       
        Other Stable Cell Lines
         
          Other Comments

          Gyc-89Db shows no guanylyl cyclase activity when expressed in COS-7 cells in the absence of additional subunits, in the presence of either Mg2+ or Mn2+ cofactor. However, when Gyc-89Db and Gyc88E are co-expressed in COS-7 cells, the level of guanylyl cyclase activity, in the presence of either Mg2+ or Mn2+, is higher than when Gyc88E is expressed alone.

          COS-7 cells co-expressing Gyc88E and Gyc-89Da or Gyc88E and Gyc-89Db accumulate low levels of cGMP under normal atmospheric oxygen conditions and are potently activated under anoxic conditions, suggesting that the Gyc88E/Gyc-89Da and Gyc88E/Gyc-89Db protein heterodimers may act as oxygen sensors.

          dsRNA made from templates generated with primers directed against this gene tested in RNAi screen for effects on Kc167 and S2R+ cell morphology.

          Relationship to Other Genes
          Source for database merge of
          Additional comments

          Source for identity of Gyc88E CG4154 was sequence comparison ( date:031005 ).

          Nomenclature History
          Source for database identify of

          Source for identity of: Gyc88E CG4154

          Nomenclature comments
          Etymology
          Synonyms and Secondary IDs (5)
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 49 )
          Sequence Crossreferences
          NCBI Gene - Gene integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.
          GenBank Nucleotide - A collection of sequences from several sources, including GenBank, RefSeq, TPA, and PDB.
          GenBank Protein - A collection of sequences from several sources, including translations from annotated coding regions in GenBank, RefSeq and TPA, as well as records from SwissProt, PIR, PRF, and PDB.
          RefSeq - A comprehensive, integrated, non-redundant, well-annotated set of reference sequences including genomic, transcript, and protein.
          UniProt/GCRP - The gene-centric reference proteome (GCRP) provides a 1:1 mapping between genes and UniProt accessions in which a single 'canonical' isoform represents the product(s) of each protein-coding gene.
          UniProt/Swiss-Prot - Manually annotated and reviewed records of protein sequence and functional information
          Other crossreferences
          AlphaFold DB - AlphaFold provides open access to protein structure predictions for the human proteome and other key proteins of interest, to accelerate scientific research.
          DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
          EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
          FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
          FlyMine - An integrated database for Drosophila genomics
          KEGG Genes - Molecular building blocks of life in the genomic space.
          MARRVEL_MODEL - MARRVEL (model organism gene)
          Linkouts
          Drosophila Genomics Resource Center - Drosophila Genomics Resource Center (DGRC) cDNA clones
          DroID - A comprehensive database of gene and protein interactions.
          DRSC - Results frm RNAi screens
          Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
          FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
          FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
          Flygut - An atlas of the Drosophila adult midgut
          iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
          KEGG Metabolic Pathways - A collection of manually drawn metabolic pathway maps representing knowledge of molecular interaction, reaction and relation networks.
          KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
          References (49)