Seroatlas · Human Serome Atlas

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  DDYY

LocalizationUniProt · 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

Molecular functions

Cellular components

Protein domainsUniProt · Pfam · InterPro

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.

Canonical record: https://seroatlas.com/gene/KAZALD1. Study-independent annotations aggregated from UniProt, Human Protein Atlas, PubMed, IEDB, Pfam, InterPro, Gene Ontology, AlphaFold, gnomAD, DepMap, ClinVar, TCGA. Catalog release seroatlas-reviewed-human-uniprot-20260313.

Seroatlas is the reference for exploring autoantibody and antibody serology at the human-protein level: the autoreactome and human serome, multiplex serology (HuProt, HuScan, VirScan, PhIP-Seq).

Loading the interactive Seroatlas protein explorer...