Protein / target

Serine/threonine protein kinase UL97

UL97P16788Human cytomegalovirus (strain AD169)Swiss-Prot

UniProt: P16788

Clinical trials

Drugs targeting

Protein at a glance

Biological role

Protein serine/threonine kinase

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

Protein profile

UniProt 2026_02

Canonical identity and biological annotation from UniProt.

Function overview

Serine/threonine protein kinase that plays important roles in several processes including nuclear viral egress, viral replication or regulation of host cell cycle progression.

View complete UniProt function annotation

Serine/threonine protein kinase that plays important roles in several processes including nuclear viral egress, viral replication or regulation of host cell cycle progression (PubMed:25339763, PubMed:31291580, PubMed:31548682). Participates in the acquisition of tegument during virion morphogenesis in the nucleus. Phosphorylates the viral nuclear egress complex (NEC) subunits UL50 and UL53 (PubMed:25339763). Redistributes the host nuclear lamina by phosphorylating cellular Lamins-A/C. Plays a role in viral DNA synthesis by phosphorylating the DNA polymerase processivity factor UL44. Stimulates host cell cycle to support viral DNA synthesis by phosphorylating host retinoblastoma/RB1 protein. Additional substrates have been identified including host EF1D or H2B. Also phosphorylates host SAMHD1 and thereby counteracts its antiviral effect by reducing its dNTP hydrolase activity (PubMed:31291580, PubMed:31548682)

Subcellular location

Virion

Domains and Gene Ontology detail (6)

Gene Ontology

Cvirion component
FATP binding
Fprotein serine kinase activity
Fprotein serine/threonine kinase activity
Psymbiont-mediated perturbation of host cell cycle progression
Pviral process

707 aa · 78 kDa

Biological roles

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

Kinase signallingUniProt · GO

View supporting evidence

Kinase signalling

·Serine/threonine protein kinase that plays important roles in several processes includin…
·protein serine kinase activity
·protein serine/threonine kinase activity

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

Approved medicines with mapped indications

1 medicine · 2 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.

Cytomegalovirus Infections1 medicine

maribavir

Virus Diseases1 medicine

maribavir

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

Drugs targeting this protein

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.

maribavir

Narrow target profileInhibitor

Phosphotransferase pUL97 inhibitor

Indicated for Cytomegalovirus Infections, Virus Diseases

Direct interaction with this protein · 1 of 2 recorded protein targets — narrow recorded profile

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

Clinical trials

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.

Comparing the Efficacy of Different Durations of Maribavir Treatment Regimens in Patients With Refractory Cytomegalovirus Infection Following Allo-HSCT: a Prospective, Multicenter, Randomized, Controlled Clinical TrialPHASE3

RECRUITING · via maribavir · NCT07511127

An Open-label, Single-arm Study to Evaluate the Safety, Tolerability, Efficacy and Pharmacokinetics of Maribavir in Chinese Transplant Recipients With Cytomegalovirus (CMV) Infections That Are Refractory or Resistant to Treatment With Ganciclovir, Valganciclovir, Cidofovir or FoscarnetPHASE3

RECRUITING · via maribavir · NCT06439342

A Phase 3, Open-label, Single-arm, Repeated-dose Study to Evaluate the Safety and Tolerability, Pharmacokinetics, and Antiviral Activity of Maribavir for the Treatment of Cytomegalovirus (CMV) Infection in Children and Adolescents Who Have Received a Hematopoietic Stem Cell Transplant (HSCT) or a Solid Organ Transplant (SOT)PHASE3

RECRUITING · via maribavir · NCT05319353

Maribavir Treatment of Cytomegalovirus for Lymphoid Malignancy Patients Undergoing Bispecific AntibodiesPHASE2

RECRUITING · via maribavir · NCT07014319

View all trials (13)

Randomized Controlled Trial Comparing the Tolerability and Efficacy of Maribavir vs. Valganciclovir for CMV Prophylaxis in High-Risk Kidney Transplant RecipientsPHASE4

COMPLETED · via maribavir · NCT06034925

A Phase 3, Open-Label, Single-Arm Study to Assess the Efficacy, Safety, and Pharmacokinetics of Maribavir for the Treatment of Cytomegalovirus (CMV) Infection in Japanese Recipients of a Hematopoietic Stem Cell Transplant (HSCT) or Solid Organ Transplant (SOT)PHASE3

COMPLETED · via maribavir · NCT05137717

A Phase 3, Multicenter, Randomized, Double-blind, Double-dummy, Active-controlled Study to Assess the Efficacy and Safety of Maribavir Compared to Valganciclovir for the Treatment of Cytomegalovirus (CMV) Infection in Hematopoietic Stem Cell Transplant RecipientsPHASE3

COMPLETED · via maribavir · NCT02927067

A Phase 3, Multicenter, Randomized, Open-label, Active-controlled Study to Assess the Efficacy and Safety of Maribavir Treatment Compared to Investigator-assigned Treatment in Transplant Recipients With Cytomegalovirus (CMV) Infections That Are Refractory or Resistant to Treatment With Ganciclovir, Valganciclovir, Foscarnet, or CidofovirPHASE3

COMPLETED · via maribavir · NCT02931539

A Randomized, Double-blind Study To Assess The Efficacy And Safety Of Prophylactic Use Of Maribavir Versus Oral Ganciclovir For The Prevention Of Cytomegalovirus Disease In Recipients Of Orthotopic Liver TransplantsPHASE3

COMPLETED · via maribavir · NCT00497796

A Randomized, Double-blind, Placebo-controlled Study to Assess the Efficacy and Safety of Prophylactic Use of Maribavir for the Prevention of Cytomegalovirus Disease in Recipients of Allogeneic Stem Cell Transplants.PHASE3

COMPLETED · via maribavir · NCT00411645

A Phase 2, Randomized Study to Assess the Safety and Anti-cytomegalovirus (CMV) Activity of Different Doses of Maribavir for Treatment of CMV Infections That Are Resistant or Refractory to Treatment With Ganciclovir/Valganciclovir or Foscarnet in Transplant RecipientsPHASE2

COMPLETED · via maribavir · NCT01611974

A Randomized, Double-blind, Placebo-controlled, Dose-ranging Study to Assess the Safety, Tolerability, and Prophylactic Anti-cytomegalovirus Activity of Maribavir in Recipients of Allogeneic Stem Cell TransplantsPHASE2

COMPLETED · via maribavir · NCT00223925

A Phase 1, Open-Label, Randomized, Crossover Study to Evaluate the Effect of Food on Maribavir (TAK-620) Pharmacokinetics in Healthy Adult ParticipantsPHASE1

COMPLETED · via maribavir · NCT05382104

A Phase 1, Open-label, Randomized, Cross-over Study to Evaluate the Pharmacokinetics, Safety, and Tolerability of a Single Oral Dose of Maribavir Administered in Healthy Japanese Subjects Compared With Matched, Healthy, Non-Hispanic, Caucasian Subjects and to Assess Dose-Proportionality of 3 Doses of Maribavir in the Japanese SubjectsPHASE1

COMPLETED · via maribavir · NCT04497883

A Phase 1, Open-label, Randomized, Crossover, Bioavailability, Dose Proportionality, and Food Effect Study Comparing the Pharmacokinetics and Palatability of Two Candidate Pediatric Powder-for-Oral-Suspension Formulations of Maribavir to the Current Maribavir Tablet Formulation Administered in Healthy Adult SubjectsPHASE1

TERMINATED · via maribavir · NCT04131556

A Phase 1, Open-label, 2-period Fixed-sequence Study to Evaluate the Effect of Multiple Doses of SHP620 (Maribavir) on the Pharmacokinetics of Digoxin and Dextromethorphan in Healthy Adult SubjectsPHASE1

COMPLETED · via maribavir · NCT02775240

A Phase I/II Trial to Evaluate the Tolerability, Anti-CMV Activity and Pharmacokinetics of 1263W94 Following Multiple Oral Administration of Escalating Doses in HIV-Infected Patients With Asymptomatic CMV SheddingPHASE1

COMPLETED · via maribavir · NCT00002373

ClinicalTrials.gov via the drug-target graph.

What's happening now

Recent therapeutic activity around this target — regulatory actions, clinical trials and safety signals for a drug that targets 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.

Regulatory approval2022-11-09
Approval: Livtencity (EMA)
ema · regulatory · ema · via maribavir

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.