FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\PGRP-SC2
Open Close
General Information
Symbol
Dmel\PGRP-SC2
Species
D. melanogaster
Name
Peptidoglycan recognition protein SC2
Annotation Symbol
CG14745
Feature Type
FlyBase ID
FBgn0043575
Gene Model Status
Stock Availability
Enzyme Name (EC)
N-acetylmuramoyl-L-alanine amidase (3.5.1.28)
Gene Summary
Peptidoglycan recognition protein SC2 (PGRP-SC2) encodes a secreted peptidoglycan recognition protein (PGRP) with an amidase activity against peptidoglycans. It contributes to the down-regulation of the immune deficiency pathway, notably in the fat body during systemic bacterial infection. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

PGRP-SC, Peptidoglycan-recognition protein-SC2 precursor

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-59
RefSeq locus
NT_033778 REGION:8716950..8717695
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (12 terms)
Molecular Function (4 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN002475783
inferred from sequence or structural similarity with UniProtKB:C0HK99
inferred from electronic annotation with InterPro:IPR017331
inferred from electronic annotation with InterPro:IPR006619
Biological Process (7 terms)
Terms Based on Experimental Evidence (3 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
involved_in immune response
inferred from biological aspect of ancestor with PANTHER:PTN002475783
inferred from electronic annotation with InterPro:IPR017331
inferred from sequence or structural similarity with UniProtKB:C0HK99
Cellular Component (1 term)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
is_active_in extracellular space
inferred from biological aspect of ancestor with PANTHER:PTN002475783
Protein Family (UniProt)
Belongs to the N-acetylmuramoyl-L-alanine amidase 2 family. (Q9V4X2)
Catalytic Activity (EC/Rhea)
N-acetylmuramoyl-L-alanine amidase activity
Hydrolyzes the link between N-acetylmuramoyl residues and L-amino acid residues in certain cell-wall glycopeptides (3.5.1.28)
Summaries
Gene Snapshot
Peptidoglycan recognition protein SC2 (PGRP-SC2) encodes a secreted peptidoglycan recognition protein (PGRP) with an amidase activity against peptidoglycans. It contributes to the down-regulation of the immune deficiency pathway, notably in the fat body during systemic bacterial infection. [Date last reviewed: 2019-03-14]
Gene Group (FlyBase)
SHORT PEPTIDOGLYCAN RECOGNITION PROTEINS -
Peptidoglycan recognition proteins (PGRPs) are pattern recognition molecules of the innate immune response that bind peptidoglycans. Insect PGRPs can be divided into two groups based on transcript size: short PGRPs (PGRP-S) and long PGRPs (PGRP-L). PGRP-S have signal peptides and can be extracellular proteins. (Adapted from FBrf0223078).
N-ACETYLMURAMOYL-L-ALANINE AMIDASES -
N-acetylmuramoyl-L-alanine amidases catalyze the hydrolysis of the link between N-acetylmuramoyl residues and L-amino acid residues in certain bacterial cell-wall glycopeptides.
Pathway (FlyBase)
NEGATIVE REGULATORS OF IMD SIGNALING PATHWAY -
Negative regulators of the immune deficiency (Imd) pathway result in the decreased activity of the NFκB-like transcription factor Rel in the nucleus. Negative regulators are important in preventing damage to the host from over-activation of the pathway; preventing inappropriate triggering or terminating the response. (Adapted from FBrf0224587 and FBrf0238555.)
EXTRACELLULAR SPATZLE ACTIVATING PATHWAY CORE COMPONENTS -
In Drosophila, activation of the Toll pathway is controlled by the generation of a cleaved, active, Toll-binding form of spatzle ligand. Proteolytic activation of spatzle ligand lies downstream of several zymogen activation cascades that are initiated by different cues. In dorsal-ventral patterning, localized activation of spz results in ventral nuclear accumulation of dl. During viral and fungal and gram positive bacterial immune challenge, zymogen cascades are activated by extracellular pattern recognition receptors or virulence factor-mediated cleavage of the zymogen persephone (psh). (Adapted from FBrf0091014 and FBrf0223077).
Protein Function (UniProtKB)
N-acetylmuramyl-L-alanine amidase involved in innate immunity by degrading bacterial peptidoglycans (PGN). Probably plays a scavenger role by digesting biologically active PGN into biologically inactive fragments. Has no direct bacteriolytic activity (By similarity).
(UniProt, Q9V4X2)
Gene Model and Products
Number of Transcripts
1
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\PGRP-SC2 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 Q9V4X2)

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

Gene model reviewed during 5.49

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0088709
746
184
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
Polypeptides with Identical Sequences

There is only one protein coding transcript and one polypeptide associated with this gene

Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
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\PGRP-SC2 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).

-0.36

Transcript Expression
RT-PCR
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

PGRP-SC2 is expressed in the gut and proventriculus and levels are tied to the immune response.

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\PGRP-SC2 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 ( 1 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 7 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of PGRP-SC2
Transgenic constructs containing regulatory region of PGRP-SC2
Aberrations (Deficiencies and Duplications) ( 2 )
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) (4)
12 of 14
Yes
Yes
1  
6 of 14
No
No
1  
6 of 14
No
No
5 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) (5)
12 of 14
Yes
Yes
7 of 14
No
No
5 of 14
No
No
5 of 14
No
No
1 of 14
No
Yes
Mus musculus (laboratory mouse) (4)
12 of 14
Yes
Yes
6 of 14
No
No
6 of 14
No
Yes
5 of 14
No
No
Xenopus tropicalis (Western clawed frog) (7)
9 of 13
Yes
Yes
3 of 13
No
No
2 of 13
No
No
2 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Danio rerio (Zebrafish) (3)
11 of 14
Yes
Yes
6 of 14
No
No
6 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (1)
1 of 14
Yes
No
Anopheles gambiae (African malaria mosquito) (8)
10 of 12
Yes
No
10 of 12
Yes
No
6 of 12
No
No
4 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
Arabidopsis thaliana (thale-cress) (0)
Saccharomyces cerevisiae (Brewer's yeast) (0)
Schizosaccharomyces pombe (Fission yeast) (0)
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:PGRP-SC2. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (12)
11 of 13
10 of 13
9 of 13
7 of 13
7 of 13
6 of 13
6 of 13
6 of 13
6 of 13
5 of 13
4 of 13
3 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 ( 0 )
    Human Ortholog
    Disease
    Evidence
    References
    Modifiers Based on Experimental Evidence ( 1 )
    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
    Summary of Genetic Interactions
    Interaction Browsers

    Please look at the allele data for full details of the genetic interactions
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    External Data
    Linkouts
    DroID - A comprehensive database of gene and protein interactions.
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    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)
    2R
    Recombination map
    2-59
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    44E2-44E2
    Limits computationally determined from genome sequence between P{PZ}l(2)44DEa05847 and P{lacW}Rya-r44Fk04913
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (5)
    Genomic Clones (12)
     

    Please Note FlyBase no longer curates genomic clone accessions so this list may not be complete

    cDNA Clones (0)
     

    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
            Other 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

                  Identified as a gene with significant level of mRNA cycling as assessed by expression analysis using high density oligonucleotide arrays with probe generated from adult heads harvested over six time points over the course of a day. Shows alteration in expression in a Clk mutant background.

                  Relationship to Other Genes
                  Source for database merge of

                  Source for merge of: PGRP-SC2 CG14745

                  Additional comments
                  Nomenclature History
                  Source for database identify of
                  Nomenclature comments
                  Etymology
                  Synonyms and Secondary IDs (11)
                  Reported As
                  Symbol Synonym
                  CG14745 PGRP
                  PGRP-SC2
                  (Joly et al., 2025, Kang et al., 2025, Rommelaere et al., 2025, Wei et al., 2025, Wu et al., 2025, Zheng et al., 2025, Balakireva et al., 2024, Fioriti et al., 2024, Hachfi et al., 2024, Hédelin et al., 2024, Li et al., 2024, Bossen et al., 2023, Gupta et al., 2023, Khan et al., 2023, Krejčová et al., 2023, Abe et al., 2022, Gallo et al., 2022, Yu et al., 2022, Zhou et al., 2022, Ferguson et al., 2021, Zhou et al., 2021, Zhou et al., 2021, Benoit et al., 2020, Hung et al., 2020, Lu et al., 2020, Nishihara, 2020, Rodriguez-Fernandez et al., 2020, Swanson et al., 2020, Zhou and Boutros, 2020, Zhou et al., 2020, Maitra et al., 2019, Sanuki et al., 2019, Hemphill et al., 2018, Musselman et al., 2018, Wang et al., 2018, Duneau et al., 2017, Yadav et al., 2017, Capo et al., 2016, Costechareyre et al., 2016, Castillo et al., 2015, Jasper, 2015, Kavi et al., 2015, Ma et al., 2015, Bonnay et al., 2014, Chen et al., 2014, Guo et al., 2014, Hang et al., 2014, Kurata, 2014, Myllymäki et al., 2014, Taylor et al., 2014, Ayyaz and Jasper, 2013, Marianes and Spradling, 2013, Petersen et al., 2013, Short and Lazzaro, 2013, Stefanatos et al., 2013, Telonis-Scott et al., 2013, Japanese National Institute of Genetics, 2012.5.21, Kalajdzic et al., 2012, Petersen et al., 2012, Rynes et al., 2012, Marcu et al., 2011, Paredes et al., 2011, Valanne et al., 2011, Carpenter et al., 2009, Obbard et al., 2009, Ye et al., 2009, Zsindely et al., 2009, Wagner et al., 2008, Firth and Baker, 2007, Waterhouse et al., 2007, Zaidman-Remy et al., 2007, Bischoff et al., 2006, Lazzaro et al., 2006, Lazzaro et al., 2004, Roxstrom-Lindquist et al., 2004, Jiggins and Hurst, 2003, Mellroth et al., 2003, Christophides et al., 2002)
                  Name Synonyms
                  Peptidoglycan recognition protein SC2
                  Peptidoglycan-recognition protein-SC2 precursor
                  Secondary FlyBase IDs
                  • FBgn0033328
                  Datasets (0)
                  Study focus (0)
                  Experimental Role
                  Project
                  Project Type
                  Title
                  Study result (0)
                  Result
                  Result Type
                  Title
                  External Crossreferences and Linkouts ( 52 )
                  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
                  UniProt/TrEMBL - Automatically annotated and unreviewed 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
                  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 Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
                  References (141)