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Masp1 Gene Detail
Summary
  • Symbol
    Masp1
  • Name
    MBL associated serine protease 1
  • Synonyms
    Crarf
  • Feature Type
    protein coding gene
  • IDs
    MGI:88492
    NCBI Gene: 17174
  • Alliance
    genome feature page
  • Transcription Start Sites
    9 TSS
Location &
Maps
more
  • Sequence Map
    Chr16:23268167-23339565 bp, - strand
    From Ensembl annotation of GRCm39
  • View this region in JBrowse
  • Genome Browsers
    Ensembl | UCSC | NCBI
  • Genetic Map
    Chromosome 16, 14.23 cM, cytoband B2-B3
  • Mapping Data
    4 experiments
Strain
Comparison
more
  • SNPs within 2kb
    2045 from dbSNP Build 142
  • Strain Annotations
    14
  • PCR
    1
For selected strains:
Strain Gene Model ID Feature Type Coordinates Select Strains
C57BL/6J MGI_C57BL6J_88492
 protein coding gene Chr16:23261778-23340127 (-)
129S1/SvImJ ENSMUSG00200041658
 protein coding gene Chr16:20272075-20343478 (-)
A/J ENSMUSG00195031618
 protein coding gene Chr16:19826583-19897999 (-)
AKR/J ENSMUSG00220041577
 protein coding gene Chr16:20146001-20217428 (-)
BALB/cJ ENSMUSG00180034218
 protein coding gene Chr16:20067175-20138594 (-)
C3H/HeJ ENSMUSG00175040306
 protein coding gene Chr16:20212096-20283519 (-)
C57BL/6NJ ENSMUSG00215030764
 protein coding gene Chr16:19939310-20010710 (-)
CAROLI/EiJ MGP_CAROLIEiJ_G0020618
 protein coding gene Chr16:20667631-20736369 (-)
CAST/EiJ no annotation
CBA/J ENSMUSG00210042653
 protein coding gene Chr16:20233728-20305150 (-)
DBA/2J ENSMUSG00185033224
 protein coding gene Chr16:20172553-20243970 (-)
FVB/NJ ENSMUSG00205043585
 protein coding gene Chr16:20173233-20244646 (-)
JF1/MsJ no annotation
LP/J ENSMUSG00230029795
 protein coding gene Chr16:22751520-22822923 (-)
NOD/ShiLtJ ENSMUSG00190030540
 protein coding gene Chr16:20313941-20385353 (-)
NZO/HlLtJ ENSMUSG00225036007
 protein coding gene Chr16:26002688-26074118 (-)
PWK/PhJ no annotation
SPRET/EiJ no annotation
WSB/EiJ no annotation



Homology
more
  • Human Ortholog
    MASP1, MBL associated serine protease 1
  • Vertebrate Orthologs
    3
Vertebrate Orthology Source
Alliance of Genome Resources
  • Human Ortholog
    MASP1, MBL associated serine protease 1
  • Synonyms
    3MC1, CRARF, CRARF1, MAP-1, MAP1, MAp44, MASP, MASP-3, MASP3, PRSS5, RaRF
  • Links
    NCBI Gene ID: 5648
    UniProt: P48740

  • Chr Location
    3q27.3; chr3:187217282-187291980 (-)  GRCh38
Human Diseases
more
  • Diseases
    1 with human MASP1 associations

Human Disease Mouse Models
      
IDs
Click on a disease name to see all genes associated with that disease.

Mutations,
Alleles, and
Phenotypes
less
  • Phenotype Summary
    15 phenotypes from 2 alleles in 2 genetic backgrounds
    22 phenotype references
Phenotype Overview

adipose tissue
behavior/neurological
cardiovascular system
cellular
craniofacial
digestive/alimentary system
embryo
endocrine/exocrine glands
growth/size/body
hearing/vestibular/ear
hematopoietic system
homeostasis/metabolism
integument
immune system
limbs/digits/tail
liver/biliary system
mortality/aging
muscle
nervous system
pigmentation
renal/urinary system
reproductive system
respiratory system
skeleton
taste/olfaction
neoplasm
vision/eye

Click cells to view annotations.
Mice homozygous for a knockout allele display decreased survivor rate, reduced body weight, and impaired activation of the lectin and alternative complement pathways.
Gene Ontology
(GO)
Classifications
less
  • All GO Annotations
    66
  • GO References
    11
Molecular Function

carbohydrate derivative binding
cytoskeletal protein binding
DNA binding
enzyme regulator
hydrolase
ligase
lipid binding
oxidoreductase
RNA binding
signaling receptor activity
signaling receptor binding
transcription
transferase
transporter
Biological Process

carbohydrate derivative metabolism
cell differentiation
cell population proliferation
cellular component organization
DNA-templated transcription
establishment of localization
homeostatic process
immune system process
lipid metabolic process
programmed cell death
protein metabolic process
response to stimulus
signaling
system development
Cellular Component

cell projection
cytoplasmic vesicle
cytoskeleton
cytosol
endoplasmic reticulum
endosome
extracellular region
Golgi apparatus
mitochondrion
membraneless organelle
nucleus
organelle envelope
organelle lumen
plasma membrane
protein-containing complex
synapse
vacuole
Click cells to view annotations.
Expression
less
Expression Overview

early conceptus
embryo ectoderm
embryo endoderm
embryo mesoderm
embryo mesenchyme
extraembryonic component
alimentary system
auditory system
branchial arches
cardiovascular system
connective tissue
endocrine system
exocrine system
hemolymphoid system
integumental system
limbs
liver and biliary system
musculoskeletal system
nervous system
olfactory system
reproductive system
respiratory system
urinary system
visual system
Click cells to view annotations.


  • Assay Results
    654
  • Tissues
    36
  • cDNA Data
    52
  • Literature Summary
    7
  • Comparison Matrix
    Gene Expression + Phenotype
    • Sequences &
    Gene Models
    less
    Representative SequencesLengthStrain/SpeciesFlank
    genomic ENSMUSG00000022887 Ensembl Gene Model | MGI Sequence Detail 71399 C57BL/6J ±  kb
    transcript ENSMUST00000229619 Ensembl | MGI Sequence Detail 3786 Not Applicable  
    polypeptide ENSMUSP00000155665 Ensembl | MGI Sequence Detail 733 Not Applicable  
    For the selected sequence
    Protein
    Information
    less
    Molecular
    Reagents
    less
    • All nucleic 62
      cDNA 54
      Primer pair 7
      Other 1
      Antibodies 1

      Microarray probesets 5
    Other
    Accession IDs
    less
    MGD-MRK-2130, MGI:2146613
    References
    more
    • Summaries
      All 61
      Developmental Gene Expression 7
      Gene Ontology 11
      Phenotypes 22
    • Earliest
      J:17689 Takahashi A, et al., Presence of a serine protease in the complement-activating component of the complement-dependent bactericidal factor, RaRF, in mouse serum. Biochem Biophys Res Commun. 1993 Feb 15;190(3):681-7
    • Latest
      J:376527 Zhang Y, et al., A spatial atlas of the complement system uncovers unique expression patterns in postnatal brain development in mice. Nat Commun. 2025 Dec 2;16(1):11132
    Contributing Projects:
    Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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    Funding Information
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    Send questions and comments to User Support.     		last database update
    09/08/2026
    MGI 6.24     		The Jackson Laboratory