6EEH

Bioreductive 4-hydroxy-3-nitro-5-ureido-benzenesulfonamides selectively target the tumor-associated carbonic anhydrase isoforms IX and XII and show hypoxia-enhanced cytotoxicity against human cancer cell lines.

Functional Information from GO Data

Chain	GOid	namespace	contents
A	0002009	biological_process	morphogenesis of an epithelium
A	0004064	molecular_function	arylesterase activity
A	0004089	molecular_function	carbonate dehydratase activity
A	0005515	molecular_function	protein binding
A	0005737	cellular_component	cytoplasm
A	0005829	cellular_component	cytosol
A	0005886	cellular_component	plasma membrane
A	0008270	molecular_function	zinc ion binding
A	0015670	biological_process	carbon dioxide transport
A	0016020	cellular_component	membrane
A	0016829	molecular_function	lyase activity
A	0018820	molecular_function	cyanamide hydratase activity
A	0032230	biological_process	positive regulation of synaptic transmission, GABAergic
A	0032849	biological_process	positive regulation of cellular pH reduction
A	0038166	biological_process	angiotensin-activated signaling pathway
A	0043209	cellular_component	myelin sheath
A	0044070	biological_process	regulation of monoatomic anion transport
A	0045177	cellular_component	apical part of cell
A	0046872	molecular_function	metal ion binding
A	0046903	biological_process	secretion
A	0051453	biological_process	regulation of intracellular pH
A	0070050	biological_process	neuron cellular homeostasis
A	0070062	cellular_component	extracellular exosome
A	2001150	biological_process	positive regulation of dipeptide transmembrane transport
A	2001225	biological_process	regulation of chloride transport

Functional Information from PDB Data

site_id	AC1
Number of Residues	4
Details	binding site for residue ZN A 301

Chain	Residue
A	HIS94
A	HIS96
A	HIS119
A	J4D302

---

site_id	AC2
Number of Residues	20
Details	binding site for residue J4D A 302

Chain	Residue
A	HIS94
A	HIS96
A	HIS119
A	VAL131
A	GLY132
A	VAL135
A	LEU198
A	THR199
A	THR200
A	PRO202
A	ZN301
A	J4D303
A	J4D304
A	HOH417
A	HOH421
A	ASN62
A	HIS64
A	SER65
A	GLN67
A	GLN92

---

site_id	AC3
Number of Residues	8
Details	binding site for residue J4D A 303

Chain	Residue
A	TRP5
A	PHE20
A	VAL131
A	PRO201
A	PRO202
A	J4D302
A	J4D304
A	HOH417

---

site_id	AC4
Number of Residues	11
Details	binding site for residue J4D A 304

Chain	Residue
A	LEU100
A	ASP130
A	GLY132
A	LYS133
A	VAL135
A	GLN136
A	PRO202
A	ALA204
A	J4D302
A	J4D303
A	HOH435

---

Functional Information from PROSITE/UniProt

site_id	PS00162
Number of Residues	17
Details	ALPHA_CA_1 Alpha-carbonic anhydrases signature. SEHtVdkkkYaaELHLV

Chain	Residue	Details
A	SER105-VAL121

---

Functional Information from SwissProt/UniProt

site_id	SWS_FT_FI1
Number of Residues	1
Details	ACT_SITE: Proton donor/acceptor => ECO:0000305|PubMed:15667203, ECO:0000305|PubMed:17330962

Chain	Residue	Details
A	HIS64

---

site_id	SWS_FT_FI2
Number of Residues	1
Details	BINDING: BINDING => ECO:0000269|PubMed:11076507, ECO:0000269|PubMed:12499545, ECO:0000269|PubMed:1336460, ECO:0000269|PubMed:1433293, ECO:0000269|PubMed:1909891, ECO:0000269|PubMed:19583303, ECO:0000269|PubMed:3151019, ECO:0000269|PubMed:3151020, ECO:0000269|PubMed:4621826, ECO:0000269|PubMed:7761440, ECO:0000269|PubMed:7803386, ECO:0000269|PubMed:7901850, ECO:0000269|PubMed:8218160, ECO:0000269|PubMed:8262987, ECO:0000269|PubMed:8331673, ECO:0000269|PubMed:8399159, ECO:0000269|PubMed:8431430, ECO:0000269|PubMed:8451242, ECO:0000269|PubMed:8482389, ECO:0000269|PubMed:8639494, ECO:0000269|PubMed:8987974, ECO:0000269|PubMed:9398308, ECO:0000269|PubMed:9865942

Chain	Residue	Details
A	HIS94

---

site_id	SWS_FT_FI3
Number of Residues	2
Details	BINDING: BINDING => ECO:0000269|PubMed:11076507, ECO:0000269|PubMed:12499545, ECO:0000269|PubMed:1336460, ECO:0000269|PubMed:1433293, ECO:0000269|PubMed:1909891, ECO:0000269|PubMed:19583303, ECO:0000269|PubMed:3151019, ECO:0000269|PubMed:3151020, ECO:0000269|PubMed:7761440, ECO:0000269|PubMed:7803386, ECO:0000269|PubMed:7901850, ECO:0000269|PubMed:8218160, ECO:0000269|PubMed:8262987, ECO:0000269|PubMed:8331673, ECO:0000269|PubMed:8399159, ECO:0000269|PubMed:8431430, ECO:0000269|PubMed:8451242, ECO:0000269|PubMed:8482389, ECO:0000269|PubMed:8639494, ECO:0000269|PubMed:8987974, ECO:0000269|PubMed:9398308, ECO:0000269|PubMed:9865942

Chain	Residue	Details
A	HIS96
A	HIS119

---

site_id	SWS_FT_FI4
Number of Residues	1
Details	BINDING: BINDING => ECO:0000269|PubMed:10550681, ECO:0000269|PubMed:19520834

Chain	Residue	Details
A	THR199

---

site_id	SWS_FT_FI5
Number of Residues	1
Details	SITE: Fine-tunes the proton-transfer properties of H-64 => ECO:0000305|PubMed:17330962

Chain	Residue	Details
A	TYR7

---

site_id	SWS_FT_FI6
Number of Residues	2
Details	SITE: Fine-tunes the proton-transfer properties of H-64; involved in the binding of some activators, including histamine and L-histidine => ECO:0000269|PubMed:16214338, ECO:0000269|PubMed:9265618, ECO:0000305|PubMed:17330962

Chain	Residue	Details
A	ASN62
A	GLN67

---

site_id	SWS_FT_FI7
Number of Residues	1
Details	SITE: Involved in the binding of some activators, including histamine and L-histidine => ECO:0000269|PubMed:16214338, ECO:0000269|PubMed:9265618, ECO:0000305|PubMed:17330962

Chain	Residue	Details
A	GLN92

---

site_id	SWS_FT_FI8
Number of Residues	2
Details	MOD_RES: Phosphoserine => ECO:0007744|PubMed:24275569

Chain	Residue	Details
A	SER166
A	SER173

---

Catalytic Information from CSA

site_id	MCSA1
Number of Residues	6
Details	M-CSA 216

Chain	Residue	Details
A	HIS64	hydrogen bond acceptor, hydrogen bond donor, proton acceptor, proton donor
A	HIS94	metal ligand
A	HIS96	metal ligand
A	GLU106	activator, electrostatic stabiliser, hydrogen bond acceptor
A	HIS119	metal ligand
A	THR199	activator, electrostatic stabiliser, hydrogen bond acceptor, hydrogen bond donor, increase nucleophilicity

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