3AI8 - JenaLib

Asymmetric Unit (Jmol Viewer)

Asym. Unit - sites (Jmol Viewer)

Biological Unit 1 (Jmol Viewer)

Biol. Unit 1 - sites (Jmol Viewer)

Biological Unit 2 (Jmol Viewer)

Title :   CATHEPSIN B IN COMPLEX WITH THE NITROXOLINE

Authors :   M. Renko, B. Mirkovic, S. Gobec, J. Kos, D. Turk

Date :   11 May 10 (Deposition) - 18 May 11 (Release) - 29 Jan 14 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.11

Chains :   Asym. Unit : A,B
Biol. Unit 1: B  (1x)
Biol. Unit 2: A  (1x)

Keywords :   Cathepsin B, Reversible Inhibitor, Nitroxoline, 8-Hydroxy-5- Nitroquinoline, Hydrolase-Hydrolase Inhibitor Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   B. Mirkovic, M. Renko, S. Turk, I. Sosic, Z. Jevnikar, N. Obermajer, D. Turk, S. Gobec, J. Kos
Novel Mechanism Of Cathepsin B Inhibition By Antibiotic Nitroxoline And Related Compounds
Chemmedchem V. 6 1351 2011
PubMed-ID: 21598397 | Reference-DOI: 10.1002/CMDC.201100098

Molecule 1 - CATHEPSIN B
	Chains	:	B, A
	EC Number	:	3.4.22.1
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PET3A
	Expression System Strain	:	BL21DE3
	Expression System Taxid	:	562
	Expression System Vector Type	:	PLASMID
	Gene	:	CTSB
	Organism Common	:	HUMAN
	Organism Scientific	:	HOMO SAPIENS
	Organism Taxid	:	9606
	Synonym	:	CATHEPSIN B1, APP SECRETASE, APPS, CATHEPSIN B LIGHT CHAIN, CATHEPSIN B HEAVY CHAIN

		1	2
Asymmetric Unit	:	A	B
Biological Unit 1 (1x)	:		B
Biological Unit 2 (1x)	:	A

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (1, 2)

No.	Name	Count	Type	Full Name
1	HNQ	2	Ligand/Ion	5-NITROQUINOLIN-8-OL

Biological Unit 1 (1, 1)

No.	Name	Count	Type	Full Name
1	HNQ	1	Ligand/Ion	5-NITROQUINOLIN-8-OL

Biological Unit 2 (1, 1)

No.	Name	Count	Type	Full Name
1	HNQ	1	Ligand/Ion	5-NITROQUINOLIN-8-OL

Asymmetric Unit (2, 2)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	GLN B:23 , GLY B:24 , SER B:25 , CYS B:26 , GLY B:27 , HIS B:110 , HIS B:111 , THR B:120 , GLY B:121 , TRP B:221 , HOH B:276 , HOH B:344	BINDING SITE FOR RESIDUE HNQ B 255
2	AC2	SOFTWARE	GLN A:23 , GLY A:24 , SER A:25 , CYS A:26 , GLY A:27 , HIS A:110 , HIS A:111 , THR A:120 , HIS A:199 , TRP A:221	BINDING SITE FOR RESIDUE HNQ A 255

Asymmetric Unit

No.	Residues
1	A:14	-	A:43
2	A:26	-	A:71
3	A:62	-	A:128
4	A:63	-	A:67
5	A:100	-	A:132
6	A:108	-	A:119
7	B:14	-	B:43
8	B:26	-	B:71
9	B:62	-	B:128
10	B:63	-	B:67
11	B:100	-	B:132
12	B:108	-	B:119

(no "Cis Peptide Bond" information available for 3AI8)

Asymmetric Unit (2, 4)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_051512	P	91	L	CATB_HUMAN	Polymorphism	11548596	A/B	P	12	L
2	UniProt	VAR_014696	S	235	N	CATB_HUMAN	Polymorphism	17573	A/B	S	156	N

SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

Biological Unit 1 (2, 2)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_051512	P	91	L	CATB_HUMAN	Polymorphism	11548596	B	P	12	L
2	UniProt	VAR_014696	S	235	N	CATB_HUMAN	Polymorphism	17573	B	S	156	N

SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

Biological Unit 2 (2, 2)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_051512	P	91	L	CATB_HUMAN	Polymorphism	11548596	A	P	12	L
2	UniProt	VAR_014696	S	235	N	CATB_HUMAN	Polymorphism	17573	A	S	156	N

SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

Asymmetric Unit (3, 6)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	THIOL_PROTEASE_CYS	PS00139	Eukaryotic thiol (cysteine) proteases cysteine active site.	CATB_HUMAN	102-113	2	A:23-34 B:23-34
2	THIOL_PROTEASE_HIS	PS00639	Eukaryotic thiol (cysteine) proteases histidine active site.	CATB_HUMAN	276-286	2	A:197-207 B:197-207
3	THIOL_PROTEASE_ASN	PS00640	Eukaryotic thiol (cysteine) proteases asparagine active site.	CATB_HUMAN	293-312	2	A:214-233 B:214-233

Biological Unit 1 (3, 3)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	THIOL_PROTEASE_CYS	PS00139	Eukaryotic thiol (cysteine) proteases cysteine active site.	CATB_HUMAN	102-113	1	- B:23-34
2	THIOL_PROTEASE_HIS	PS00639	Eukaryotic thiol (cysteine) proteases histidine active site.	CATB_HUMAN	276-286	1	- B:197-207
3	THIOL_PROTEASE_ASN	PS00640	Eukaryotic thiol (cysteine) proteases asparagine active site.	CATB_HUMAN	293-312	1	- B:214-233

Biological Unit 2 (3, 3)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	THIOL_PROTEASE_CYS	PS00139	Eukaryotic thiol (cysteine) proteases cysteine active site.	CATB_HUMAN	102-113	1	A:23-34 -
2	THIOL_PROTEASE_HIS	PS00639	Eukaryotic thiol (cysteine) proteases histidine active site.	CATB_HUMAN	276-286	1	A:197-207 -
3	THIOL_PROTEASE_ASN	PS00640	Eukaryotic thiol (cysteine) proteases asparagine active site.	CATB_HUMAN	293-312	1	A:214-233 -

Asymmetric Unit (7, 14)

	ENSEMBL					UniProtKB			PDB
No.	Transcript ID	Exon	Exon ID	Genome Location	Length	ID	Location	Length	Count	Location	Length
1.4a	ENST00000353047	4a	ENSE00001831074	chr8:11725738-11725510	229	CATB_HUMAN	-	0	0	-	-
1.13e	ENST00000353047	13e	ENSE00002149435	chr8:11710988-11710838	151	CATB_HUMAN	1-42	42	0	-	-
1.14b	ENST00000353047	14b	ENSE00002152237	chr8:11710204-11710119	86	CATB_HUMAN	43-71	29	0	-	-
1.15e	ENST00000353047	15e	ENSE00001087019	chr8:11708489-11708375	115	CATB_HUMAN	71-109	39	2	A:-1-30 B:-1-30	32 32
1.17f	ENST00000353047	17f	ENSE00002158636	chr8:11706673-11706555	119	CATB_HUMAN	110-149	40	2	A:31-70 B:31-70	40 40
1.18h	ENST00000353047	18h	ENSE00001087012	chr8:11705661-11705576	86	CATB_HUMAN	149-178	30	2	A:70-99 B:70-99	30 30
1.19b	ENST00000353047	19b	ENSE00001087016	chr8:11705331-11705188	144	CATB_HUMAN	178-226	49	2	A:99-147 B:99-147	49 49
1.20d	ENST00000353047	20d	ENSE00001087013	chr8:11704677-11704561	117	CATB_HUMAN	226-265	40	2	A:147-186 B:147-186	40 40
1.21a	ENST00000353047	21a	ENSE00001087015	chr8:11703298-11703170	129	CATB_HUMAN	265-308	44	2	A:186-229 B:186-229	44 44
1.22h	ENST00000353047	22h	ENSE00002162645	chr8:11702731-11700317	2415	CATB_HUMAN	308-339	32	2	A:229-254 B:229-254	26 26

Asymmetric Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
	SAPs(SNPs)	PROSITE motifs	Exons
	(details for a mapped element are shown in a popup box when the mouse pointer rests over it)

Chain A from PDB  Type:PROTEIN  Length:256
 aligned with CATB_HUMAN | P07858 from UniProtKB/Swiss-Prot  Length:339

    Alignment length:256
                                    87        97       107       117       127       137       147       157       167       177       187       197       207       217       227       237       247       257       267       277       287       297       307       317       327      
           CATB_HUMAN    78 LKLPASFDAREQWPQCPTIKEIRDQGSCGSCWAFGAVEAISDRICIHTNAHVSVEVSAEDLLTCCGSMCGDGCNGGYPAEAWNFWTRKGLVSGGLYESHVGCRPYSIPPCEHHVNGSRPPCTGEGDTPKCSKICEPGYSPTYKQDKHYGYNSYSVSNSEKDIMAEIYKNGPVEGAFSVYSDFLLYKSGVYQHVTGEMMGGHAIRILGWGVENGTPYWLVANSWNTDWGDNGFFKILRGQDHCGIESEVVAGIPRTD 333
               SCOP domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......eehhhhh..hhhhhh........hhhhhhhhhhhhhhhhhhh........hhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhh....................................................hhhhhh......ee...hhhhhhhhhhhhh.eeeeeeeehhhhh....ee......eeeeeeeeeeeeeee..eeeeeee...........eeeee...hhhhh....ee...... Sec.struct. author
                 SAPs(SNPs) -------------L-----------------------------------------------------------------------------------------------------------------------------------------------N-------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------THIOL_PROTEA------------------------------------------------------------------------------------------------------------------------------------------------------------------THIOL_PROTE------THIOL_PROTEASE_ASN  --------------------- PROSITE
           Transcript 1 (1) Exon 1.15e  PDB: A:-1-30        Exon 1.17f  PDB: A:31-70                ----------------------------Exon 1.19b  PDB: A:99-147 UniProt: 178-226       --------------------------------------Exon 1.21a  PDB: A:186-229 UniProt: 265-308 ------------------------- Transcript 1 (1)
           Transcript 1 (2) -----------------------------------------------------------------------Exon 1.18h  PDB: A:70-99      -----------------------------------------------Exon 1.20d  PDB: A:147-186              ------------------------------------------Exon 1.22h  PDB: A:229-254 Transcript 1 (2)
                 3ai8 A  -1 LKLPASFDAREQWPQCPTIKEIRDQGSCGSCWAFGAVEAISDRICIHTNAHVSVEVSAEDLLTCCGSMCGDGCNGGYPAEAWNFWTRKGLVSGGLYESHVGCRPYSIPPCEHHVNGSRPPCTGEGDTPKCSKICEPGYSPTYKQDKHYGYNSYSVSNSEKDIMAEIYKNGPVEGAFSVYSDFLLYKSGVYQHVTGEMMGGHAIRILGWGVENGTPYWLVANSWNTDWGDNGFFKILRGQDHCGIESEVVAGIPRTD 254
                                     8        18        28        38        48        58        68        78        88        98       108       118       128       138       148       158       168       178       188       198       208       218       228       238       248

Chain B from PDB  Type:PROTEIN  Length:256
 aligned with CATB_HUMAN | P07858 from UniProtKB/Swiss-Prot  Length:339

    Alignment length:256
                                    87        97       107       117       127       137       147       157       167       177       187       197       207       217       227       237       247       257       267       277       287       297       307       317       327      
           CATB_HUMAN    78 LKLPASFDAREQWPQCPTIKEIRDQGSCGSCWAFGAVEAISDRICIHTNAHVSVEVSAEDLLTCCGSMCGDGCNGGYPAEAWNFWTRKGLVSGGLYESHVGCRPYSIPPCEHHVNGSRPPCTGEGDTPKCSKICEPGYSPTYKQDKHYGYNSYSVSNSEKDIMAEIYKNGPVEGAFSVYSDFLLYKSGVYQHVTGEMMGGHAIRILGWGVENGTPYWLVANSWNTDWGDNGFFKILRGQDHCGIESEVVAGIPRTD 333
               SCOP domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......eehhhhh..hhhhhh........hhhhhhhhhhhhhhhhhhh........hhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhh....................................................hhhhhh......ee...hhhhhhhhhhhhh.eeeeeeeehhhhh....ee......eeeeeeeeeeeeeee..eeeeeee...........eeeee...hhhhh....ee...... Sec.struct. author
                 SAPs(SNPs) -------------L-----------------------------------------------------------------------------------------------------------------------------------------------N-------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------THIOL_PROTEA------------------------------------------------------------------------------------------------------------------------------------------------------------------THIOL_PROTE------THIOL_PROTEASE_ASN  --------------------- PROSITE
           Transcript 1 (1) Exon 1.15e  PDB: B:-1-30        Exon 1.17f  PDB: B:31-70                ----------------------------Exon 1.19b  PDB: B:99-147 UniProt: 178-226       --------------------------------------Exon 1.21a  PDB: B:186-229 UniProt: 265-308 ------------------------- Transcript 1 (1)
           Transcript 1 (2) -----------------------------------------------------------------------Exon 1.18h  PDB: B:70-99      -----------------------------------------------Exon 1.20d  PDB: B:147-186              ------------------------------------------Exon 1.22h  PDB: B:229-254 Transcript 1 (2)
                 3ai8 B  -1 LKLPASFDAREQWPQCPTIKEIRDQGSCGSCWAFGAVEAISDRICIHTNAHVSVEVSAEDLLTCCGSMCGDGCNGGYPAEAWNFWTRKGLVSGGLYESHVGCRPYSIPPCEHHVNGSRPPCTGEGDTPKCSKICEPGYSPTYKQDKHYGYNSYSVSNSEKDIMAEIYKNGPVEGAFSVYSDFLLYKSGVYQHVTGEMMGGHAIRILGWGVENGTPYWLVANSWNTDWGDNGFFKILRGQDHCGIESEVVAGIPRTD 254
                                     8        18        28        38        48        58        68        78        88        98       108       118       128       138       148       158       168       178       188       198       208       218       228       238       248

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

(no "SCOP Domain" information available for 3AI8)

(no "CATH Domain" information available for 3AI8)

(no "Pfam Domain" information available for 3AI8)

Asymmetric Unit(hide GO term definitions)

Chain A,B (CATB_HUMAN | P07858)

molecular function
	GO:0005518	collagen binding	Interacting selectively and non-covalently with collagen, a group of fibrous proteins of very high tensile strength that form the main component of connective tissue in animals. Collagen is highly enriched in glycine (some regions are 33% glycine) and proline, occurring predominantly as 3-hydroxyproline (about 20%).
	GO:0004197	cysteine-type endopeptidase activity	Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile.
	GO:0008234	cysteine-type peptidase activity	Catalysis of the hydrolysis of peptide bonds in a polypeptide chain by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile.
	GO:0004175	endopeptidase activity	Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain.
	GO:0016787	hydrolase activity	Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
	GO:0030984	kininogen binding	Interacting selectively and non-covalently with a kininogen, any of a group of plasma proteins that are kinin precursors.
	GO:0008233	peptidase activity	Catalysis of the hydrolysis of a peptide bond. A peptide bond is a covalent bond formed when the carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of a second amino acid.
	GO:0042277	peptide binding	Interacting selectively and non-covalently with peptides, any of a group of organic compounds comprising two or more amino acids linked by peptide bonds.
	GO:0005515	protein binding	Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
	GO:0032403	protein complex binding	Interacting selectively and non-covalently with any protein complex (a complex of two or more proteins that may include other nonprotein molecules).
	GO:0043621	protein self-association	Interacting selectively and non-covalently with a domain within the same polypeptide.
	GO:0043394	proteoglycan binding	Interacting selectively and non-covalently with a proteoglycan, any glycoprotein in which the carbohydrate units are glycosaminoglycans.
	GO:0004252	serine-type endopeptidase activity	Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a catalytic mechanism that involves a catalytic triad consisting of a serine nucleophile that is activated by a proton relay involving an acidic residue (e.g. aspartate or glutamate) and a basic residue (usually histidine).
biological process
	GO:0006914	autophagy	The process in which cells digest parts of their own cytoplasm; allows for both recycling of macromolecular constituents under conditions of cellular stress and remodeling the intracellular structure for cell differentiation.
	GO:0071260	cellular response to mechanical stimulus	Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a mechanical stimulus.
	GO:0097067	cellular response to thyroid hormone stimulus	A change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a thyroid hormone stimulus.
	GO:0030574	collagen catabolic process	The proteolytic chemical reactions and pathways resulting in the breakdown of collagen in the extracellular matrix, usually carried out by proteases secreted by nearby cells.
	GO:0046697	decidualization	The cellular and vascular changes occurring in the endometrium of the pregnant uterus just after the onset of blastocyst implantation. This process involves the proliferation and differentiation of the fibroblast-like endometrial stromal cells into large, polyploid decidual cells that eventually form the maternal component of the placenta.
	GO:0030855	epithelial cell differentiation	The process in which a relatively unspecialized cell acquires specialized features of an epithelial cell, any of the cells making up an epithelium.
	GO:0060548	negative regulation of cell death	Any process that decreases the rate or frequency of cell death. Cell death is the specific activation or halting of processes within a cell so that its vital functions markedly cease, rather than simply deteriorating gradually over time, which culminates in cell death.
	GO:0006508	proteolysis	The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
	GO:0051603	proteolysis involved in cellular protein catabolic process	The hydrolysis of a peptide bond or bonds within a protein as part of the chemical reactions and pathways resulting in the breakdown of a protein by individual cells.
	GO:0042981	regulation of apoptotic process	Any process that modulates the occurrence or rate of cell death by apoptotic process.
	GO:0050790	regulation of catalytic activity	Any process that modulates the activity of an enzyme.
	GO:0014075	response to amine	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an amine stimulus. An amine is a compound formally derived from ammonia by replacing one, two or three hydrogen atoms by hydrocarbyl groups.
	GO:0034097	response to cytokine	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a cytokine stimulus.
	GO:0045471	response to ethanol	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an ethanol stimulus.
	GO:0009749	response to glucose	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a glucose stimulus.
	GO:0070670	response to interleukin-4	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an interleukin-4 stimulus.
	GO:0009612	response to mechanical stimulus	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a mechanical stimulus.
	GO:0014070	response to organic cyclic compound	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an organic cyclic compound stimulus.
	GO:0043434	response to peptide hormone	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a peptide hormone stimulus. A peptide hormone is any of a class of peptides that are secreted into the blood stream and have endocrine functions in living animals.
	GO:0009611	response to wounding	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus indicating damage to the organism.
	GO:0007519	skeletal muscle tissue development	The developmental sequence of events leading to the formation of adult skeletal muscle tissue. The main events are: the fusion of myoblasts to form myotubes that increase in size by further fusion to them of myoblasts, the formation of myofibrils within their cytoplasm and the establishment of functional neuromuscular junctions with motor neurons. At this stage they can be regarded as mature muscle fibers.
	GO:0007283	spermatogenesis	The process of formation of spermatozoa, including spermatocytogenesis and spermiogenesis.
	GO:0002224	toll-like receptor signaling pathway	Any series of molecular signals generated as a consequence of binding to a toll-like receptor. Toll-like receptors directly bind pattern motifs from a variety of microbial sources to initiate innate immune response.
	GO:0046718	viral entry into host cell	The process that occurs after viral attachment by which a virus, or viral nucleic acid, breaches the plasma membrane or cell envelope and enters the host cell. The process ends when the viral nucleic acid is released into the host cell cytoplasm.
cellular component
	GO:0016324	apical plasma membrane	The region of the plasma membrane located at the apical end of the cell.
	GO:0005901	caveola	A membrane raft that forms small pit, depression, or invagination that communicates with the outside of a cell and extends inward, indenting the cytoplasm and the cell membrane. Examples include flask-shaped invaginations of the plasma membrane in adipocytes associated with caveolin proteins, and minute pits or incuppings of the cell membrane formed during pinocytosis. Caveolae may be pinched off to form free vesicles within the cytoplasm.
	GO:0009986	cell surface	The external part of the cell wall and/or plasma membrane.
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	GO:0036021	endolysosome lumen	The volume enclosed by the membrane of an endolysosome. An endolysosome is a transient hybrid organelle formed by fusion of a late endosome with a lysosome.
	GO:0009897	external side of plasma membrane	The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
	GO:0070062	extracellular exosome	A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
	GO:0005576	extracellular region	The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.
	GO:0005615	extracellular space	That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.
	GO:0005622	intracellular	The living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm.
	GO:0043231	intracellular membrane-bounded organelle	Organized structure of distinctive morphology and function, bounded by a single or double lipid bilayer membrane and occurring within the cell. Includes the nucleus, mitochondria, plastids, vacuoles, and vesicles. Excludes the plasma membrane.
	GO:0005764	lysosome	A small lytic vacuole that has cell cycle-independent morphology and is found in most animal cells and that contains a variety of hydrolases, most of which have their maximal activities in the pH range 5-6. The contained enzymes display latency if properly isolated. About 40 different lysosomal hydrolases are known and lysosomes have a great variety of morphologies and functions.
	GO:0042470	melanosome	A tissue-specific, membrane-bounded cytoplasmic organelle within which melanin pigments are synthesized and stored. Melanosomes are synthesized in melanocyte cells.
	GO:0005739	mitochondrion	A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.
	GO:0005730	nucleolus	A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome.
	GO:0048471	perinuclear region of cytoplasm	Cytoplasm situated near, or occurring around, the nucleus.
	GO:0042383	sarcolemma	The outer membrane of a muscle cell, consisting of the plasma membrane, a covering basement membrane (about 100 nm thick and sometimes common to more than one fiber), and the associated loose network of collagen fibers.

Asymmetric Unit
	Complete Structure
		Jena3D(integrated viewing of ligand, site, SAP, PROSITE, SCOP information)
		WebMol \| AstexViewer[tm]@PDBe (Java Applets, require no local installation except for Java; loading may be slow)
		STRAP (Java WebStart application, automatic local installation, requires Java; full application with system access!)
		RasMol (require local installation)
		Molscript (VRML) (requires installation of a VRML viewer; select preferred view via VRML and generate a mono or stereo PDF format file)

	Ligands, Modified Residues, Ions
		HNQ	[ RasMol \| Jena3D ]	+environment [ RasMol \| Jena3D ]

	Sites
		AC1	[ RasMol ]	+environment [ RasMol ]
		AC2	[ RasMol ]	+environment [ RasMol ]

	Cis Peptide Bonds
(no "Cis Peptide Bonds" information available for 3ai8)

Biological Units
	Complete Structure
		Biological Unit 1	[ Jena3D ]
		Biological Unit 2	[ Jena3D ]

Jmol
	protein: cartoon or spacefill or dots and stick; nucleic acid: cartoon and stick; ligands: spacefill; active site: stick [ Asym. Unit PNG format \| Asym. Unit - sites PNG format \| Biol. Unit 1 PNG format \| Biol. Unit 1 - sites PNG format \| Biol. Unit 2 PNG format ](automatic orientation, automatically generated)
Molscript
	protein, nucleic acid: cartoon; ligands: spacefill; active site: ball and stick [ mono PDF format \| stereo PDF format ](default orientation, automatically generated)

Access by PDB/NDB ID
	3ai8
		Family and Domain Information	:	ProDom \| SYSTERS
		General Structural Information	:	GlycoscienceDB \| MMDB \| NDB \| OCA \| PDB \| PDBe \| PDBj \| PDBsum \| PDBWiki \| PQS \| PROTEOPEDIA
		Orientation in Membranes	:	OPM
		Protein Surface	:	SURFACE
		Secondary Structure	:	DSSP (structure derived) \| HSSP (homology derived)
		Structural Genomics	:	GeneCensus
		Structural Neighbours	:	CE \| VAST
		Structure Classification	:	CATH \| Dali \| SCOP
		Validation and Original Data	:	BMRB Data View \| BMRB Restraints Grid \| EDS \| PROCHECK \| RECOORD \| WHAT_CHECK

Access by UniProt ID/Accession number
	CATB_HUMAN \| P07858
		Comparative Protein Structure Models	:	ModBase
		Genomic Information	:	Ensembl
		Protein-protein Interaction	:	DIP
		Sequence, Family and Domain Information	:	InterPro \| Pfam \| SMART \| UniProtKB/SwissProt

Access by Enzyme Classificator (EC Number)
	3.4.22.1
		General Enzyme Information	:	BRENDA \| EC-PDB \| Enzyme \| IntEnz
		Pathway	:	KEGG \| MetaCyc

Access by Disease Identifier (MIM ID)
	(no 'MIM ID' available)
		Disease Information	:	OMIM

Access by GenAge ID
	(no 'GenAge ID' available)
		Age Related Information	:	GenAge

Access by PDB/NDB ID
		Domain Information	:	XDom
		Interatomic Contacts of Structural Units	:	CSU
		Ligand-protein Contacts	:	LPC
		Protein Cavities	:	castP
		Sequence and Secondary Structure	:	PDBCartoon
		Structure Alignment	:	STRAP(Java WebStart application, automatic local installation, requires Java; full application with system access!)
		Structure and Sequence Browser	:	STING

Access by UniProt ID/Accession number
	CATB_HUMAN \| P07858
		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)

UniProtKB/Swiss-Prot
	CATB_HUMAN \| P07858	:	1csb 1gmy 1huc 1pbh 2ipp 2pbh 3cbj 3cbk 3k9m 3pbh

(no "Related Entries Specified in the PDB File" available for 3AI8)

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (1, 2)

Sites (2, 2)

SS Bonds (12, 12)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (2, 4)

PROSITE Motifs (3, 6)

Exons (7, 14)

Sequences/Alignments

Classification and Annotation

SCOP Domains (0, 0)

CATH Domains (0, 0)

Pfam Domains (0, 0)

Gene Ontology (54, 54)

Visualization

Interactive Views

Still Images

Databases and Analysis Tools

Databases

Analysis Tools

Related Entries

Entries Sharing at Least One Protein Chain (UniProt ID)

Related Entries Specified in the PDB File