KAZALD1
Kazal-type serine protease inhibitor domain-containing protein 1
Also known as: FKSG28, FKSG40, KAZD1_HUMAN
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- Q96I82
- Gene
- KAZALD1
- Ensembl
- ENSG00000107821
- Chromosome
- 10
- Canonical length
- 304 aa
- Protein class
- Predicted secreted proteins
- Secretome location
- Secreted to extracellular matrix
OverviewNCBI Gene
This gene encodes a secreted member of the insulin growth factor-binding protein (IGFBP) superfamily. The protein contains an insulin growth factor-binding domain in its N-terminal region, a Kazal-type serine protease inhibitor and follistatin-like domain in its central region, and an immunoglobulin-like domain in its C-terminal region. Studies of the mouse ortholog suggest that this protein may function in bone development and bone regeneration. This gene is hypomethylated and over-expressed in high-grade glioma compared to low-grade glioma, and thus the hypomethylated gene may be associated with cell proliferation and the shorter survival of patients with high-grade glioma. It is also one of numerous genes found to be deleted in a novel 5.54 Mb interstitial deletion, which is associated with multiple congenital anomalies. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2016]
Canonical amino-acid sequenceUniProt
304 residues, UniProt reviewed canonical sequence.
>Q96I82|KAZALD1
1 MLPPPRPAAA LALPVLLLLL VVLTPPPTGA RPSPGPDYLR RGWMRLLAEG EGCAPCRPEE
61 CAAPRGCLAG RVRDACGCCW ECANLEGQLC DLDPSAHFYG HCGEQLECRL DTGGDLSRGE
121 VPEPLCACRS QSPLCGSDGH TYSQICRLQE AARARPDANL TVAHPGPCES GPQIVSHPYD
181 TWNVTGQDVI FGCEVFAYPM ASIEWRKDGL DIQLPGDDPH ISVQFRGGPQ RFEVTGWLQI
241 QAVRPSDEGT YRCLGRNALG QVEAPASLTV LTPDQLNSTG IPQLRSLNLV PEEEAESEEN
301 DDYYLocalizationUniProt · AlphaFold · HPA
Whether an antibody against KAZALD1 can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Secreted
- Secreted
- Yes
- Transmembrane segments
- 0
- Mean surface accessibility (rSASA)
- 0.42
- Highest tissue expression
- 14 nTPM
Expression across tissuesHPA
Tissue
- spleen: 14 nTPM
- cervix: 6.7 nTPM
- blood vessel: 6.6 nTPM
- stomach: 6.2 nTPM
- heart muscle: 5.5 nTPM
- salivary gland: 5.4 nTPM
Single-cell type
- enterocytes: 75 nCPM
- goblet cells: 70 nCPM
- foveolar cells: 55 nCPM
- gastric chief cells: 25 nCPM
- mucous neck cells: 23 nCPM
- colonocytes: 21 nCPM
Immune cell
- basophil: 0 nTPM
- classical monocyte: 0 nTPM
- eosinophil: 0 nTPM
- gdT-cell: 0 nTPM
- intermediate monocyte: 0 nTPM
- MAIT T-cell: 0 nTPM
Brain region
- cerebral cortex: 1.2 nTPM
- hippocampal formation: 1.2 nTPM
- thalamus: 1.2 nTPM
- pons: 1.1 nTPM
- cerebellum: 1 nTPM
- amygdala: 0.9 nTPM
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 1.46
- gnomAD pLI
- 0
- gnomAD missense Z
- 0.12
- DepMap mean gene effect
- -0.01
- DepMap dependency class
- selective
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 3% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
- cell differentiation
- extracellular matrix organization
- ossification
- regulation of cell growth
- regulation of signal transduction
Molecular functions
Cellular components
Protein domainsUniProt · Pfam · InterPro
- Insulin-like growth factor-binding protein, IGFBP
- Kazal domain
- Immunoglobulin subtype 2
- Immunoglobulin domain subtype
- Immunoglobulin-like domain
- Growth factor receptor cysteine-rich domain superfamily
- Insulin-like growth factor binding protein-related protein (IGFBP-rP), MAC25
- Immunoglobulin I-set
- Immunoglobulin-like fold
- Kazal domain superfamily
- Immunoglobulin-like domain superfamily
- Insulin-like growth factor binding protein
- Kazal-type serine protease inhibitor domain
- Immunoglobulin I-set domain
KeywordsUniProt
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads KAZALD1 as an antibody target. Whether an autoantibody or antibody against KAZALD1 could matter depends on whether native KAZALD1 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
KAZALD1 is annotated as secreted, so native KAZALD1 circulates and is directly accessible to antibodies. Secreted and cell-surface proteins are the autoantibody targets most likely to act like drugs, blocking or depleting the native protein.
Annotation status
The present source text does not explicitly label KAZALD1 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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