6MXZ

Structure of 53BP1 Tudor domains in complex with small molecule UNC3474

External Resource: Annotation

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

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d6mxza2	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, C-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d6mxza1	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, N-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d6mxzb2	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, C-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d6mxzb1	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, N-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d6mxzc2	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, C-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d6mxzc1	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, N-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d6mxzd2	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, C-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d6mxzd1	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, N-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E	d6mxze2	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, C-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E	d6mxze1	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, N-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E	d6mxze3	Artifacts	Tags	Tags	Tags	N-terminal Tags	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
F	d6mxzf2	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, C-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
F	d6mxzf1	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, N-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G	d6mxzg2	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, C-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G	d6mxzg1	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, N-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G	d6mxzg3	Artifacts	Tags	Tags	Tags	N-terminal Tags	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
H	d6mxzh2	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, C-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
H	d6mxzh1	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, N-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
I	d6mxzi2	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, C-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
I	d6mxzi1	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, N-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
J	d6mxzj2	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, C-terminal domain	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
J	d6mxzj1	All beta proteins	SH3-like barrel	Tudor/PWWP/MBT	Tudor domain	p53-binding protein 1, 53BP1, N-terminal domain	Human (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	Tudor/PWWP/MBT domain-like	8041642	3000404	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041640	3000404	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041642	3000404	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041640	3000404	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041642	3000404	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041640	3000404	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041642	3000404	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041640	3000404	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041640	3000404	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041642	3000404	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041640	3000404	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041642	3000404	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041642	3000404	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041640	3000404	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041640	3000404	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041642	3000404	SCOP2B (2022-06-29)
I	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041642	3000404	SCOP2B (2022-06-29)
I	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041640	3000404	SCOP2B (2022-06-29)
J	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041642	3000404	SCOP2B (2022-06-29)
J	SCOP2B Superfamily	Tudor/PWWP/MBT domain-like	8041640	3000404	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	53-BP1_Tudor_C	e6mxzA2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_C	ECOD (1.6)
A	53-BP1_Tudor_N	e6mxzA1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_N	ECOD (1.6)
B	53-BP1_Tudor_C	e6mxzB1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_C	ECOD (1.6)
B	53-BP1_Tudor_N	e6mxzB2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_N	ECOD (1.6)
C	53-BP1_Tudor_C	e6mxzC1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_C	ECOD (1.6)
C	53-BP1_Tudor_N	e6mxzC2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_N	ECOD (1.6)
D	53-BP1_Tudor_C	e6mxzD2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_C	ECOD (1.6)
D	53-BP1_Tudor_N	e6mxzD1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_N	ECOD (1.6)
E	53-BP1_Tudor_C	e6mxzE1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_C	ECOD (1.6)
E	53-BP1_Tudor_N	e6mxzE2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_N	ECOD (1.6)
F	53-BP1_Tudor_C	e6mxzF1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_C	ECOD (1.6)
F	53-BP1_Tudor_N	e6mxzF2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_N	ECOD (1.6)
G	53-BP1_Tudor_C	e6mxzG2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_C	ECOD (1.6)
G	53-BP1_Tudor_N	e6mxzG1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_N	ECOD (1.6)
H	53-BP1_Tudor_C	e6mxzH1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_C	ECOD (1.6)
H	53-BP1_Tudor_N	e6mxzH2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_N	ECOD (1.6)
I	53-BP1_Tudor_C	e6mxzI1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_C	ECOD (1.6)
I	53-BP1_Tudor_N	e6mxzI2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_N	ECOD (1.6)
J	53-BP1_Tudor_C	e6mxzJ2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_C	ECOD (1.6)
J	53-BP1_Tudor_N	e6mxzJ1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: 53-BP1_Tudor_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Provenance Source (Version)
A	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
A	2.30.30.30	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
B	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
B	2.30.30.30	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
C	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
C	2.30.30.30	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
D	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
D	2.30.30.30	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
E	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
E	2.30.30.30	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
F	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
F	2.30.30.30	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
G	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
G	2.30.30.30	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
H	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
H	2.30.30.30	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
I	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
I	2.30.30.30	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
J	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)
J	2.30.30.30	Mainly Beta	Roll	SH3 type barrels.	CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	PF09038	Tumour suppressor p53-binding protein-1 Tudor (53-BP1_Tudor)	Tumour suppressor p53-binding protein-1 Tudor	Members of this family consist of ten beta-strands and a carboxy-terminal alpha-helix. The amino-terminal five beta-strands and the C-terminal five beta-strands adopt folds that are identical to each other. This domain is essential for the recruitmen ...	Members of this family consist of ten beta-strands and a carboxy-terminal alpha-helix. The amino-terminal five beta-strands and the C-terminal five beta-strands adopt folds that are identical to each other. This domain is essential for the recruitment of proteins to double stranded breaks in DNA, which is mediated by interaction with methylated Lys 79 of histone H3 [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	TP53-binding protein 1	p53 binding protein binding binding histone binding transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity transcription factor binding RNA polymerase II-specific DNA-binding transcription factor binding DNA-binding transcription factor binding sequence-specific DNA binding DNA binding organic cyclic compound binding p53 binding protein binding binding histone binding transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity transcription factor binding RNA polymerase II-specific DNA-binding transcription factor binding DNA-binding transcription factor binding sequence-specific DNA binding DNA binding organic cyclic compound binding nucleic acid binding telomeric DNA binding damaged DNA binding histone reader activity chromatin-protein adaptor activity ubiquitin-modified protein reader activity ubiquitin-modified histone reader activity modification-dependent protein binding ubiquitin-like protein reader activity methylated histone binding methylation-dependent protein binding	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process regulation of DNA recombination regulation of cellular process regulation of double-strand break repair regulation of cellular response to stress negative regulation of biological process regulation of primary metabolic process negative regulation of DNA repair nucleobase-containing compound metabolic process cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process regulation of DNA recombination regulation of cellular process regulation of double-strand break repair regulation of cellular response to stress negative regulation of biological process regulation of primary metabolic process negative regulation of DNA repair nucleobase-containing compound metabolic process organic substance metabolic process regulation of response to stress negative regulation of double-strand break repair negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process recombinational repair regulation of nucleobase-containing compound metabolic process negative regulation of double-strand break repair via homologous recombination double-strand break repair via homologous recombination DNA repair negative regulation of macromolecule metabolic process double-strand break repair regulation of biological process negative regulation of response to stimulus negative regulation of metabolic process DNA recombination biological regulation primary metabolic process DNA metabolic process regulation of macromolecule metabolic process nucleic acid metabolic process regulation of DNA repair regulation of double-strand break repair via homologous recombination negative regulation of DNA recombination organic cyclic compound metabolic process regulation of response to stimulus metabolic process negative regulation of DNA metabolic process macromolecule metabolic process regulation of metabolic process regulation of DNA metabolic process adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of leukocyte activation regulation of cell activation B cell activation involved in immune response positive regulation of macromolecule biosynthetic process multicellular organism development positive regulation of immune response organic substance biosynthetic process regulation of immune system process positive regulation of macromolecule metabolic process system development positive regulation of DNA recombination positive regulation of immunoglobulin mediated immune response immune response cellular metabolic process immune effector process regulation of gene expression biosynthetic process positive regulation of DNA metabolic process B cell mediated immunity positive regulation of production of molecular mediator of immune response regulation of macromolecule biosynthetic process immunoglobulin production regulation of developmental process positive regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains somatic cell DNA recombination positive regulation of cellular metabolic process positive regulation of lymphocyte activation somatic diversification of immunoglobulins involved in immune response somatic recombination of immunoglobulin gene segments positive regulation of biosynthetic process regulation of immunoglobulin mediated immune response positive regulation of isotype switching regulation of B cell activation leukocyte activation involved in immune response positive regulation of immune effector process positive regulation of cellular process positive regulation of immunoglobulin production production of molecular mediator of immune response regulation of isotype switching cell activation macromolecule biosynthetic process regulation of cellular biosynthetic process positive regulation of gene expression immune system process somatic diversification of immune receptors via germline recombination within a single locus positive regulation of cellular biosynthetic process regulation of lymphocyte activation multicellular organismal process regulation of immune effector process lymphocyte mediated immunity positive regulation of leukocyte mediated immunity cell activation involved in immune response positive regulation of developmental process positive regulation of cell activation positive regulation of metabolic process positive regulation of leukocyte activation anatomical structure development leukocyte mediated immunity somatic diversification of immune receptors positive regulation of adaptive immune response positive regulation of immune system process somatic recombination of immunoglobulin genes involved in immune response developmental process positive regulation of nucleobase-containing compound metabolic process regulation of adaptive immune response regulation of cellular metabolic process regulation of B cell mediated immunity somatic diversification of immunoglobulins regulation of leukocyte mediated immunity positive regulation of multicellular organismal process regulation of immune response regulation of production of molecular mediator of immune response isotype switching immune system development immunoglobulin production involved in immunoglobulin-mediated immune response positive regulation of lymphocyte mediated immunity cellular biosynthetic process positive regulation of biological process lymphocyte activation positive regulation of B cell mediated immunity leukocyte activation positive regulation of response to stimulus regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of multicellular organismal process lymphocyte activation involved in immune response regulation of biosynthetic process B cell activation gene expression positive regulation of B cell activation adaptive immune response immunoglobulin mediated immune response regulation of immunoglobulin production regulation of lymphocyte mediated immunity double-strand break repair via classical nonhomologous end joining double-strand break repair via nonhomologous end joining positive regulation of DNA-binding transcription factor activity RNA metabolic process RNA biosynthetic process positive regulation of molecular function nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of RNA biosynthetic process nucleobase-containing compound biosynthetic process regulation of molecular function regulation of DNA-binding transcription factor activity organic cyclic compound biosynthetic process regulation of DNA-templated transcription response to X-ray cellular response to ionizing radiation cellular response to radiation cellular response to environmental stimulus cellular response to X-ray response to ionizing radiation response to radiation response to abiotic stimulus cellular response to abiotic stimulus positive regulation of RNA metabolic process positive regulation of DNA-templated transcription positive regulation of RNA biosynthetic process cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly protein homooligomerization cellular component organization or biogenesis transcription by RNA polymerase II regulation of transcription by RNA polymerase II positive regulation of transcription by RNA polymerase II DNA damage checkpoint signaling regulation of cell cycle phase transition signaling negative regulation of cell cycle cell cycle phase transition intracellular signal transduction cell communication negative regulation of cell cycle phase transition signal transduction cell cycle regulation of cell cycle cell cycle process regulation of cell cycle process DNA integrity checkpoint signaling negative regulation of cell cycle process cell cycle checkpoint signaling signal transduction in response to DNA damage	protein-containing complex catalytic complex DNA repair complex intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen protein-containing complex catalytic complex DNA repair complex intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen chromosome chromosomal region kinetochore intracellular non-membrane-bounded organelle chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome non-membrane-bounded organelle replication fork site of double-strand break site of DNA damage nuclear body chromosome, telomeric region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR047252	TP53-binding protein 1-like	Family
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR014722	Large ribosomal subunit protein uL2, domain 2	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR001357	BRCT domain	Domain
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR036420	BRCT domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR047249	TP53-binding protein 1-like, first BRCT domain	Domain
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR047250	TP53-binding protein 1-like, second BRCT domain	Domain
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR015125	Tumour suppressor p53-binding protein-1 Tudor domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	Pharos: Q12888	astrocytic tumor lung carcinoma oligodendroglioma Pick disease cancer malignant ependymoma osteosarcoma lung cancer medulloblastoma ovarian cancer