Atlas One · Host Biology · Scale 03 — Molecular

C1-Esterase Inhibitor

C1-esterase inhibitor (SERPING1; chr11q12.1) is a serpin blocking complement C1r/C1s and contact activation (FXII, kallikrein, FXIa); deficiency → bradykinin excess → vascular permeability → hereditary angioedema; icatibant (B2R antagonist) and berotralstat are approved.

Also known as: C1-INH, SERPING1, C1 inhibitor, C1 esterase inhibitor, HAE protein, C1 inactivator, serine protease inhibitor G1

Scale 03 — MolecularScale
draftStatus
2026-06-07Last Reviewed
This is an auto-generated stub page built from atlas entry frontmatter. A richer hand-crafted page is planned. See the atlas source for the full entry including detailed body sections.
c1-esterase-inhibitor

C1-Esterase Inhibitor

C1-esterase inhibitor (SERPING1; chr11q12.1) is a serpin blocking complement C1r/C1s and contact activation (FXII, kallikrein, FXIa); deficiency → bradykinin excess → vascular permeability → hereditary angioedema; icatibant (B2R antagonist) and berotralstat are approved.