Annotations: 6QB6

Mcl1 in complex with a Fab

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d6qb6a1	Membrane and cell surface proteins and peptides	Toxins' membrane translocation domains	Bcl-2 inhibitors of programmed cell death	Bcl-2 inhibitors of programmed cell death	EAT/MCL-1 (Myeloid cell leukemia sequence 1)	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d6qb6a2	Artifacts	Tags	Tags	Tags	N-terminal Tags	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth H]	d6qb6h_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth L]	d6qb6l1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Bcl-2-like inhibitors of programmed cell death	8083810	3001974	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	YEATS	e6qb6A1	A: beta barrels	X: jelly-roll	H: DUF1107-like	T: DUF1107-like	F: YEATS	ECOD (v294.2)
B [auth H]	YEATS	e6qb6H1	A: beta barrels	X: jelly-roll	H: DUF1107-like	T: DUF1107-like	F: YEATS	ECOD (v294.2)
C [auth L]	YEATS	e6qb6L1	A: beta barrels	X: jelly-roll	H: DUF1107-like	T: DUF1107-like	F: YEATS	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.437.10	Mainly Alpha	Orthogonal Bundle	Apoptosis Regulator Bcl-x	Blc2-like	CATH (utative)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
B [auth H]	Antibody Fab Fragment, anti-Mcl-1	VH-CH1	Chimeric (chimeric)	IGHV3-2101, IGHV3-2102, IGHV3-2104, IGHV3-2103, IGHJ302, IGHG101	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_LAMBDA	IMGT (202618-0)
C [auth L]	Antibody Fab Fragment, anti-Mcl-1	L-LAMBDA	Chimeric (chimeric)	IGLV1-4401, IGLJ302, IGLJ101, IGLC101	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-1_LAMBDA	IMGT (202618-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV3	-	induced myeloid leukemia cell differentiation protein mcl-1	SAbDab (2026-05-15)
C [auth L]	Light Chain	IGLV1	Lambda	induced myeloid leukemia cell differentiation protein mcl-1	SAbDab (2026-05-15)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00452	Apoptosis regulator proteins, Bcl-2 family (Bcl-2)	Apoptosis regulator proteins, Bcl-2 family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Induced myeloid leukemia cell differentiation protein Mcl-1	macromolecule transmembrane transporter activity protein transporter activity transmembrane protein transporter activity transporter activity transmembrane transporter activity protein heterodimerization activity protein binding binding protein dimerization activity death domain binding BH3 domain binding BH domain binding protein domain specific binding passive transmembrane transporter activity macromolecule transmembrane transporter activity protein transporter activity transmembrane protein transporter activity transporter activity transmembrane transporter activity protein heterodimerization activity protein binding binding protein dimerization activity death domain binding BH3 domain binding BH domain binding protein domain specific binding passive transmembrane transporter activity channel activity	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process positive regulation of cell communication intrinsic apoptotic signaling pathway in response to oxidative stress neuron apoptotic process regulation of cellular process positive regulation of signal transduction regulation of oxidative stress-induced intrinsic apoptotic signaling pathway signaling positive regulation of biological process cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process positive regulation of cell communication intrinsic apoptotic signaling pathway in response to oxidative stress neuron apoptotic process regulation of cellular process positive regulation of signal transduction regulation of oxidative stress-induced intrinsic apoptotic signaling pathway signaling positive regulation of biological process regulation of signal transduction regulation of programmed cell death regulation of intrinsic apoptotic signaling pathway positive regulation of oxidative stress-induced neuron intrinsic apoptotic signaling pathway intracellular signal transduction cell communication positive regulation of apoptotic signaling pathway positive regulation of response to stimulus regulation of intracellular signal transduction signal transduction intrinsic apoptotic signaling pathway positive regulation of neuron apoptotic process positive regulation of cellular process regulation of oxidative stress-induced neuron intrinsic apoptotic signaling pathway regulation of biological process regulation of signaling positive regulation of programmed cell death regulation of apoptotic process biological regulation positive regulation of intracellular signal transduction cell death positive regulation of apoptotic process neuron intrinsic apoptotic signaling pathway in response to oxidative stress apoptotic signaling pathway regulation of response to stimulus positive regulation of oxidative stress-induced intrinsic apoptotic signaling pathway regulation of cell communication positive regulation of intrinsic apoptotic signaling pathway apoptotic process programmed cell death regulation of neuron apoptotic process regulation of apoptotic signaling pathway positive regulation of signaling cellular homeostasis homeostatic process negative regulation of extrinsic apoptotic signaling pathway in absence of ligand signal transduction in absence of ligand negative regulation of signaling negative regulation of biological process negative regulation of cell communication extrinsic apoptotic signaling pathway negative regulation of signal transduction in absence of ligand negative regulation of extrinsic apoptotic signaling pathway negative regulation of apoptotic signaling pathway negative regulation of cellular process extrinsic apoptotic signaling pathway in absence of ligand cell surface receptor signaling pathway negative regulation of response to stimulus negative regulation of programmed cell death negative regulation of signal transduction regulation of extrinsic apoptotic signaling pathway negative regulation of apoptotic process regulation of extrinsic apoptotic signaling pathway in absence of ligand organelle fusion cellular component organization organelle organization mitochondrial fusion cellular component organization or biogenesis mitochondrion organization regulation of anoikis negative regulation of anoikis anoikis response to peptide response to chemical response to cytokine developmental process cellular developmental process cell differentiation cell fate determination cell fate commitment intrinsic apoptotic signaling pathway in response to DNA damage negative regulation of catabolic process catabolic process negative regulation of metabolic process autophagy regulation of catabolic process regulation of autophagy negative regulation of autophagy metabolic process process utilizing autophagic mechanism regulation of metabolic process apoptotic mitochondrial changes release of cytochrome c from mitochondria	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle membrane cytosol protein-containing complex Bcl-2 family protein complex nucleus membrane-enclosed lumen membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle membrane cytosol protein-containing complex Bcl-2 family protein complex nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen mitochondrial membrane organelle outer membrane organelle envelope bounding membrane of organelle mitochondrial envelope mitochondrial outer membrane outer membrane organelle membrane
B [auth H]	Fab Heavy Chain	-	-	-
C [auth L]	Fab Light Chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR020726	Apoptosis regulator, Bcl-2, BH2 motif, conserved site	Conserved Site
A	IPR036834	Bcl-2-like superfamily	Homologous Superfamily
A	IPR046371	Bcl-2, Bcl-2 homology region 1-3	Domain
A	IPR002475	Bcl2-like	Family
A	IPR026298	Bcl-2 family	Family
A	IPR020717	Apoptosis regulator, Bcl-2, BH1 motif, conserved site	Conserved Site
A	IPR013281	Apoptosis regulator, Mcl-1	Family
A	IPR020728	Apoptosis regulator, Bcl-2, BH3 motif, conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	: Q07820	Barrett esophagus plasma cell myeloma leishmaniasis spindle cell sarcoma primary cutaneous T-cell non-Hodgkin lymphoma sarcoma subependymal giant cell astrocytoma interstitial lung disease lung carcinoma Lymphoma, T-Cell, Cutaneous adenoma myeloid neoplasm osteosarcoma cancer Pick disease Barrett esophagus plasma cell myeloma leishmaniasis spindle cell sarcoma primary cutaneous T-cell non-Hodgkin lymphoma sarcoma subependymal giant cell astrocytoma interstitial lung disease lung carcinoma Lymphoma, T-Cell, Cutaneous adenoma myeloid neoplasm osteosarcoma cancer Pick disease diabetes mellitus plasma cell neoplasm gastric cancer primitive neuroectodermal tumor glioblastoma sinusitis hereditary spastic paraplegia ulcerative colitis invasive ductal breast carcinoma lung benign neoplasm malignant ependymoma malignant pancreatic neoplasm astrocytic tumor non-small cell lung carcinoma ovarian cancer chronic obstructive pulmonary disease pilocytic astrocytoma Down syndrome polycystic ovary syndrome gastric carcinoma psoriasis granulomatous slack skin disease interstitial cystitis large cell medulloblastoma lung cancer lymphatic system disease malignant glioma medulloblastoma atypical teratoid rhabdoid tumor osteoarthritis breast carcinoma pancreatic ductal adenocarcinoma cutaneous lupus erythematosus epithelioid sarcoma Gaucher disease hematologic disease

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.