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Protein / target

Guanylate cyclase soluble subunit beta-2

GUCY1B2O75343Homo sapiensSwiss-Prot
30
Clinical trials
3
Drugs targeting

Protein at a glance

Biological role

Guanylate cyclase

Derived from structured UniProt, Open Targets and literature data on this page.

Protein profile

UniProt 2026_02

Canonical identity and biological annotation from UniProt.

Subcellular location

Cytoplasm
Domains and Gene Ontology detail (10)

Domains & features

H-NOXGuanylate cyclase

Gene Ontology

  • Ccytosol
  • Cguanylate cyclase complex, soluble
  • FGTP binding
  • Fguanylate cyclase activity
  • Fheme binding
  • Fmetal ion binding
  • Pintracellular signal transduction
  • Presponse to oxygen levels

617 aa · 70 kDa

Biological roles

Reactome v97

What this protein does, drawn together from its UniProt function, Gene Ontology terms and Reactome pathways.

View underlying pathways (2)

Concepts derived from UniProt GO Reactome — each badge above shows which sources supported that role.

Approved medicines with mapped indications

3 medicines · 6 areas

Approved therapies targeting this protein, grouped by what they are approved to treat — the disease-first view of the medicines below. Relationships come from the canonical approved-indication graph (ChEMBL phase-4), the same source as the drug cards.

Hypertension, Pulmonary2 medicines
Colorectal Neoplasms1 medicine
Familial Primary Pulmonary Hypertension1 medicine
Hypertension1 medicine
Respiratory Insufficiency1 medicine
Broader indication categories (1)
Respiratory Tract Diseases1 medicine

Broad umbrella indications (e.g. “Neoplasms”). Shown here because every medicine also appears under a more specific disease above — kept for completeness, de-emphasised for clarity.

Approved indications from ChEMBL (phase-4), via the canonical drug→disease graph.

Drugs targeting this protein

3

How approved and investigational drugs engage this protein — mechanism and action type, direct vs complex targeting, and how broadly each acts across other targets. A drug-first view (the section above groups the approved ones disease-first); direct binders with few recorded targets are listed first.

Nitric Oxide
Activator

Soluble guanylate cyclase activator

Indicated for Hypertension, Pulmonary, Respiratory Insufficiency, Respiratory Tract Diseases

Acts on a complex — shared with GUCY1B1, GUCY1A2, GUCY1A1 · 1 of 4 recorded protein targets

riociguat
Positive allosteric modulator

Soluble guanylate cyclase positive allosteric modulator

Indicated for Familial Primary Pulmonary Hypertension, Hypertension, Hypertension, Pulmonary

Acts on a complex — shared with GUCY1B1, GUCY1A2, GUCY1A1 · 1 of 4 recorded protein targets

Soluble guanylate cyclase inhibitor

Indicated for Colorectal Neoplasms

Acts on a complex — shared with GUCY1B1, GUCY1A2, GUCY1A1 · 1 of 4 recorded protein targets

ChEMBL mechanism, action type, target identity and approved indications. Open Targets clinical status.

Clinical trials

30

Trials of drugs that target this protein — reached indirectly through those drugs, so a trial listed here studies the drug, not the protein. Ranked by active status, then clinical phase and recency, and spread across the targeting drugs.

View all trials (26)

ENROLLING_BY_INVITATION · via methylene blue · NCT06660680

NOT_YET_RECRUITING · via methylene blue · NCT07179003

RECRUITING · via methylene blue · NCT06887036

ACTIVE_NOT_RECRUITING · via Nitric Oxide · NCT03023449

UNKNOWN · via methylene blue · NCT02910765

ClinicalTrials.gov via the drug-target graph.

What's happening now

12

Recent therapeutic activity around this target — regulatory actions, clinical trials and safety signals for 2 drugs that target this protein, plus publications where such a drug is a genuine subject. Every item is reached indirectly through the drug, not the protein itself; incidental mentions (a paper that merely measures a drug) and press items are excluded.

  1. Trial status changed2026-08-07

    A Multicentre Randomised Cross-over Trial of Disease Specific Therapy in Patients With Pulmonary Arterial Hypertension (PAH) Implanted With Pulmonary Artery Pressure and Cardiac Rhythm Monitoring Devices (CardioMEMS/ConfirmRx)

    Status changed to Active, not recruiting · ClinicalTrials.gov · via riociguat

  2. Supplemental approval2026-08-04

    Supplemental approval: RIOCIGUAT (ANDA211135)

    fda · regulatory · fda · via riociguat

  3. Supplemental approval2026-08-04

    Supplemental approval: RIOCIGUAT (NDA204819)

    fda · regulatory · fda · via riociguat

  4. CHMP positive opinion2026-07-20

    CHMP positive opinion: Riociguat Accord (EMA)

    ema · regulatory · ema · via riociguat

  5. Supplemental approval2026-05-08

    Supplemental approval: RIOCIGUAT (ANDA211135)

    fda · regulatory · fda · via riociguat

  6. Supplemental approval2026-05-08

    Supplemental approval: RIOCIGUAT (NDA204819)

    fda · regulatory · fda · via riociguat

  7. New publication2025-04-08
    Understanding chronic inflammation: couplings between cytokines, ROS, NO, Ca<sub>i</sub> <sup>2+</sup>, HIF-1α, Nrf2 and autophagy.

    Frontiers in immunology · 2025 · 37 citations · Europe PMC · via Nitric Oxide

  8. New publication2025-01-01
    Neurological Manifestations Following Traumatic Brain Injury: Role of Behavioral, Neuroinflammation, Excitotoxicity, Nrf-2 and Nitric Oxide.

    CNS & neurological disorders drug targets · 2025 · 5 citations · Europe PMC · via Nitric Oxide

  9. New publication2024-12-11
    Systemic and Cardiac Microvascular Dysfunction in Hypertension.

    International journal of molecular sciences · 2024 · 34 citations · Europe PMC · via Nitric Oxide

  10. New publication2024-08-21
    The Unexpected Role of the Endothelial Nitric Oxide Synthase at the Neurovascular Unit: Beyond the Regulation of Cerebral Blood Flow.

    International journal of molecular sciences · 2024 · 12 citations · Europe PMC · via Nitric Oxide

  11. New publication2024-07-25
    Ca<sup>2+</sup>-dependent phosphodiesterase 1 regulates the plasticity of striatal spiny projection neuron glutamatergic synapses.

    Cell reports · 2024 · 6 citations · Europe PMC · via Nitric Oxide

  12. Safety communication2016-08-08

    Drug Safety Update: Riociguat (Adempas): not for use in patients with pulmonary hypertension associated with idiopathic interstitial pneumonias

    mhra · safety · mhra · via riociguat

Objective event titles are shown unmodified; the event kind and significance line are derived from structured fields. Forefront AttentionEvent stream aggregating Europe PMC Regulatory filings ClinicalTrials.gov.