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Human Protein Atlas

Protein Expression โ€ข Tissue Distribution โ€ข Disease Targets โ€ข Subcellular Localization

Explore protein expression data for 19,670 protein-coding genes across 44 normal human tissues, 17 cancer types, and 56 cell lines.

Genes

19,670

Tissues

44

Cancers

17

Images

28M+

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About the Human Protein Atlas

The Human Protein Atlas is a Swedish-based program mapping all human proteins in cells, tissues, and organs using integration of various omics technologies. It contains protein expression data for 19,670 protein-coding genes across 44 normal human tissues, 17 cancer types, and 56 cell lines.

19,670
Protein-Coding Genes
44
Normal Tissues
17
Cancer Types
28M+
Images Generated

PCSK9

Proprotein Convertase Subtilisin/Kexin Type 9

Q8NBP7ENSG00000169174APPROVED
98%
Relevance
Disease Associations
Cardiovascular Disease
strongtarget

Regulates LDL cholesterol by promoting LDL receptor degradation. Loss-of-function mutations protect against heart disease.

Familial Hypercholesterolemia
strongpathogenic

Gain-of-function mutations cause severe hypercholesterolemia and early coronary artery disease.

Top Expression Sites
Liver
Small Intestine
Kidney

TNNT2

Troponin T2, Cardiac Type

P45379ENSG00000118194RESEARCH
95%
Relevance
Disease Associations
Cardiovascular Disease
strongbiomarker

Gold standard biomarker for myocardial infarction. Elevated levels indicate cardiac muscle damage.

Hypertrophic Cardiomyopathy
strongpathogenic

Mutations cause inherited cardiac disease with abnormal heart muscle thickening.

Top Expression Sites
Heart Muscle
Skeletal Muscle
Smooth Muscle

CD19

B-Lymphocyte Antigen CD19

P15391ENSG00000177455APPROVED
99%
Relevance
Disease Associations
B-Cell Lymphoma
strongtarget

CAR-T cell therapy targeting CD19 achieves 80-90% remission in refractory B-cell malignancies.

Acute Lymphoblastic Leukemia
strongtarget

CD19-directed immunotherapy (CAR-T, BiTE) shows revolutionary efficacy in relapsed/refractory ALL.

Top Expression Sites
Lymphoid Tissue
Bone Marrow
Spleen

KRAS

KRAS Proto-Oncogene, GTPase

P01116ENSG00000133703CLINICAL
97%
Relevance
Disease Associations
Pancreatic Cancer
strongpathogenic

Mutated in 95% of pancreatic cancers. G12C/D/V mutations drive oncogenic signaling.

Lung Cancer
strongpathogenic

Mutated in 30% of lung adenocarcinomas. KRAS-G12C inhibitors show clinical efficacy.

Colorectal Cancer
strongpathogenic

Mutated in 40% of colorectal cancers. Predicts resistance to EGFR-targeted therapy.

Top Expression Sites
Pancreas
Colon
Lung

APP

Amyloid Beta Precursor Protein

P05067ENSG00000142192CLINICAL
96%
Relevance
Disease Associations
Alzheimer's Disease
strongpathogenic

Cleaved to produce amyloid-beta peptides that form neurotoxic plaques. Mutations cause early-onset familial AD.

Top Expression Sites
Brain
Cerebral Cortex
Hippocampus

MAPT

Microtubule Associated Protein Tau

P10636ENSG00000186868CLINICAL
97%
Relevance
Disease Associations
Alzheimer's Disease
strongpathogenic

Hyperphosphorylated tau forms neurofibrillary tangles, correlating with cognitive decline.

Frontotemporal Dementia
strongpathogenic

Tau mutations cause inherited dementia with behavioral changes and neurodegeneration.

Top Expression Sites
Brain
Cerebral Cortex
Hippocampus

SNCA

Alpha-Synuclein

P37840ENSG00000145335CLINICAL
96%
Relevance
Disease Associations
Parkinson's Disease
strongpathogenic

Aggregates into Lewy bodies in dopaminergic neurons. Multiplications and point mutations cause familial PD.

Dementia with Lewy Bodies
strongpathogenic

Alpha-synuclein aggregation throughout cortex causes dementia with parkinsonism.

Top Expression Sites
Brain
Substantia Nigra
Olfactory Bulb

SOD1

Superoxide Dismutase 1

P00441ENSG00000142168CLINICAL
95%
Relevance
Disease Associations
ALS (Amyotrophic Lateral Sclerosis)
strongpathogenic

Over 185 mutations cause familial ALS (20% of cases). Misfolded SOD1 is toxic to motor neurons.

Top Expression Sites
Spinal Cord
Brain
Skeletal Muscle
Human Protein Atlas Integration: All protein expression data is sourced from the Human Protein Atlas (www.proteinatlas.org), a publicly available database containing millions of high-resolution images showing the spatial distribution of proteins in 44 different human tissues and organs. Data combines transcriptomics, proteomics, and immunohistochemistry. Cite as: Uhlรฉn M et al., 2015. Tissue-based map of the human proteome. Science PubMed: 25613900 DOI: 10.1126/science.1260419