1EXZ - JenaLib

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Asymmetric Unit (Jmol Viewer)

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Biological Unit 1 (Jmol Viewer)

Biol. Unit 1 - sites (Jmol Viewer)

Biological Unit 2 (Jmol Viewer)

Biological Unit 3 (Jmol Viewer)

Title :   STRUCTURE OF STEM CELL FACTOR

Authors :   Z. Zhang, R. Zhang, A. Joachimiak, J. Schlessinger, X. Kong

Date :   05 May 00 (Deposition) - 06 Jul 00 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.30

Chains :   Asym. Unit : A,B,C,D
Biol. Unit 1: A,B  (1x)
Biol. Unit 2: C,D  (1x)
Biol. Unit 3: A,B,C,D  (1x)

Keywords :   Scf, Hormone/Growth Factor Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   Z. Zhang, R. Zhang, A. Joachimiak, J. Schlessinger, X. P. Kong
Crystal Structure Of Human Stem Cell Factor: Implication For Stem Cell Factor Receptor Dimerization And Activation.
Proc. Natl. Acad. Sci. Usa V. 97 7732 2000
PubMed-ID: 10884405 | Reference-DOI: 10.1073/PNAS.97.14.7732
(for further references see the PDB file header)

Molecule 1 - STEM CELL FACTOR
	Chains	:	A, B, C, D
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Taxid	:	562
	Fragment	:	26-166
	Organism Common	:	HUMAN
	Organism Scientific	:	HOMO SAPIENS
	Organism Taxid	:	9606
	Synonym	:	SCF

		1	2	3	4
Asymmetric Unit	:	A	B	C	D
Biological Unit 1 (1x)	:	A	B
Biological Unit 2 (1x)	:			C	D
Biological Unit 3 (1x)	:	A	B	C	D

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (3, 7)

No.	Name	Count	Type	Full Name
1	CA	2	Ligand/Ion	CALCIUM ION
2	SM	4	Ligand/Ion	SAMARIUM (III) ION
3	TRS	1	Ligand/Ion	2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL

Biological Unit 1 (0, 0)

No.	Name	Count	Type	Full Name
1	CA	-1	Ligand/Ion	CALCIUM ION
2	SM	-1	Ligand/Ion	SAMARIUM (III) ION
3	TRS	-1	Ligand/Ion	2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL

Biological Unit 2 (1, 1)

No.	Name	Count	Type	Full Name
1	CA	-1	Ligand/Ion	CALCIUM ION
2	SM	-1	Ligand/Ion	SAMARIUM (III) ION
3	TRS	1	Ligand/Ion	2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL

Biological Unit 3 (1, 1)

No.	Name	Count	Type	Full Name
1	CA	-1	Ligand/Ion	CALCIUM ION
2	SM	-1	Ligand/Ion	SAMARIUM (III) ION
3	TRS	1	Ligand/Ion	2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL

Asymmetric Unit (7, 7)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	ASP C:454 , ASP C:458 , HOH C:946	BINDING SITE FOR RESIDUE SM C 801
2	AC2	SOFTWARE	ARG B:207 , ASP B:285 , GLU B:288 , ASP D:677	BINDING SITE FOR RESIDUE SM B 802
3	AC3	SOFTWARE	ASP B:337 , VAL B:339 , HOH B:859	BINDING SITE FOR RESIDUE SM B 803
4	AC4	SOFTWARE	ASP A:124 , ASP A:128 , PHE C:529 , VAL C:531 , SER C:533	BINDING SITE FOR RESIDUE SM C 804
5	AC5	SOFTWARE	SER B:267 , HOH B:937 , HOH B:943 , GLU C:513	BINDING SITE FOR RESIDUE CA C 805
6	AC6	SOFTWARE	ASP A:54 , ASP A:58	BINDING SITE FOR RESIDUE CA A 806
7	AC7	SOFTWARE	GLU B:288 , ASN D:681 , ASP D:685	BINDING SITE FOR RESIDUE TRS D 807

Asymmetric Unit

No.	Residues
1	A:4	-	A:89
2	A:43	-	A:138
3	B:204	-	B:289
4	B:243	-	B:338
5	C:443	-	C:538

(no "Cis Peptide Bond" information available for 1EXZ)

Asymmetric Unit (3, 12)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_063237	N	36	S	SCF_HUMAN	Disease (FPHH)	121918653	A B C D	N	11 211 411 611	S
2	UniProt	VAR_042652	T	54	A	SCF_HUMAN	Polymorphism	3741457	A B C D	T	29 229 429 629	A
3	UniProt	VAR_076223	L	104	V	SCF_HUMAN	Unclassified	864309655	A B C D	L	79 279 479 679	V

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

Biological Unit 1 (3, 6)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_063237	N	36	S	SCF_HUMAN	Disease (FPHH)	121918653	A B C A/B	N	11 211 411 611	S
2	UniProt	VAR_042652	T	54	A	SCF_HUMAN	Polymorphism	3741457	A B C A/B	T	29 229 429 629	A
3	UniProt	VAR_076223	L	104	V	SCF_HUMAN	Unclassified	864309655	A B C A/B	L	79 279 479 679	V

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

Biological Unit 2 (3, 6)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_063237	N	36	S	SCF_HUMAN	Disease (FPHH)	121918653	A B C C/D	N	11 211 411 611	S
2	UniProt	VAR_042652	T	54	A	SCF_HUMAN	Polymorphism	3741457	A B C C/D	T	29 229 429 629	A
3	UniProt	VAR_076223	L	104	V	SCF_HUMAN	Unclassified	864309655	A B C C/D	L	79 279 479 679	V

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

Biological Unit 3 (3, 12)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_063237	N	36	S	SCF_HUMAN	Disease (FPHH)	121918653	A B C A/B/C/D	N	11 211 411 611	S
2	UniProt	VAR_042652	T	54	A	SCF_HUMAN	Polymorphism	3741457	A B C A/B/C/D	T	29 229 429 629	A
3	UniProt	VAR_076223	L	104	V	SCF_HUMAN	Unclassified	864309655	A B C A/B/C/D	L	79 279 479 679	V

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

(no "PROSITE Motif" information available for 1EXZ)

Asymmetric Unit (4, 16)

	ENSEMBL					UniProtKB			PDB
No.	Transcript ID	Exon	Exon ID	Genome Location	Length	ID	Location	Length	Count	Location	Length
1.1	ENST00000228280	1	ENSE00000993383	chr12:88974238-88974041	198	SCF_HUMAN	1-5	5	0	-	-
1.3	ENST00000228280	3	ENSE00000909415	chr12:88939642-88939529	114	SCF_HUMAN	6-43	38	4	A:4-18 B:202-218 C:409-418 D:609-618	15 17 10 10
1.5	ENST00000228280	5	ENSE00000909413	chr12:88926280-88926218	63	SCF_HUMAN	44-64	21	4	A:19-39 B:219-239 C:419-439 D:619-639	21 21 21 21
1.6	ENST00000228280	6	ENSE00000537922	chr12:88912644-88912474	171	SCF_HUMAN	65-121	57	4	A:40-96 B:240-296 C:440-496 D:640-696	57 57 57 57
1.7	ENST00000228280	7	ENSE00000752892	chr12:88910267-88910111	157	SCF_HUMAN	122-174	53	4	A:97-139 (gaps) B:297-341 C:497-539 D:697-732	43 45 43 36
1.8	ENST00000228280	8	ENSE00001416325	chr12:88909394-88909311	84	SCF_HUMAN	174-202	29	0	-	-
1.9	ENST00000228280	9	ENSE00000843426	chr12:88900914-88900805	110	SCF_HUMAN	202-238	37	0	-	-
1.10	ENST00000228280	10	ENSE00000843425	chr12:88900155-88900088	68	SCF_HUMAN	239-261	23	0	-	-
1.11	ENST00000228280	11	ENSE00001303130	chr12:88899012-88898936	77	SCF_HUMAN	261-273	13	0	-	-
1.12	ENST00000228280	12	ENSE00000993382	chr12:88890958-88886566	4393	SCF_HUMAN	-	0	0	-	-

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:133
 aligned with SCF_HUMAN | P21583 from UniProtKB/Swiss-Prot  Length:273

    Alignment length:136
                                    38        48        58        68        78        88        98       108       118       128       138       148       158      
            SCF_HUMAN    29 CRNRVTNNVKDVTKLVANLPKDYMITLKYVPGMDVLPSHCWISEMVVQLSDSLTDLLDKFSNISEGLSNYSIIDKLVNIVDDLVECVKENSSKDLKKSFKSPEPRLFTPEEFFRIFNRSIDAFKDFVVASETSDCV 164
               SCOP domains d1exza_ A: Stem cell factor, SCF                                                                                                         SCOP domains
               CATH domains 1exzA00 A:4-139  [code=1.20.1250.10, no name defined]                                                                                    CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .......hhhhhhhhhhh......eeeee.......hhhhhhhhhhhhhhhhhhhhhh.........hhhhhhhhhhhhhhhhhhhhhhh............eeeeehhhhhhhhhhhhhhhhhh.....---... Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------- PROSITE
               Transcript 1 Exon 1.3       Exon 1.5  PDB: A:19-3Exon 1.6  PDB: A:40-96 UniProt: 65-121                   Exon 1.7  PDB: A:97-139 (gaps) [INCOMPLETE] Transcript 1
                 1exz A   4 CRNRVTNNVKDVTKLVANLPKDYMITLKYVPGMDVLPSHCWISEMVVQLSDSLTDLLDKFSNISEGLSNYSIIDKLVNIVDDLVECVKENSSKDLKKSFKSPEPRLFTPEEFFRIFNRSIDAFKDFVVAS---DCV 139
                                    13        23        33        43        53        63        73        83        93       103       113       123       133   |  
                                                                                                                                                           133 137

Chain B from PDB  Type:PROTEIN  Length:140
 aligned with SCF_HUMAN | P21583 from UniProtKB/Swiss-Prot  Length:273

    Alignment length:140
                                    36        46        56        66        76        86        96       106       116       126       136       146       156       166
            SCF_HUMAN    27 GICRNRVTNNVKDVTKLVANLPKDYMITLKYVPGMDVLPSHCWISEMVVQLSDSLTDLLDKFSNISEGLSNYSIIDKLVNIVDDLVECVKENSSKDLKKSFKSPEPRLFTPEEFFRIFNRSIDAFKDFVVASETSDCVVS 166
               SCOP domains d1exzb_ B: Stem cell factor, SCF                                                                                                             SCOP domains
               CATH domains 1exzB00 B:202-341  [code=1.20.1250.10, no name defined]                                                                                      CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .........hhhhhhhhhhh......eeee........hhhhhhhhhhhhhhhhhhhhhh.........hhhhhhhhhhhhhhhhhhhh................eeeehhhhhhhhhhhhhhh................ Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
               Transcript 1 Exon 1.3         Exon 1.5             Exon 1.6  PDB: B:240-296 UniProt: 65-121                 Exon 1.7  PDB: B:297-341 UniProt: 122-174     Transcript 1
                 1exz B 202 GICRNRVTNNVKDVTKLVANLPKDYMITLKYVPGMDVLPSHCWISEMVVQLSDSLTDLLDKFSNISEGLSNYSIIDKLVNIVDDLVECVKENSSKDLKKSFKSPEPRLFTPEEFFRIFNRSIDAFKDFVVASETSDCVVS 341
                                   211       221       231       241       251       261       271       281       291       301       311       321       331       341

Chain C from PDB  Type:PROTEIN  Length:131
 aligned with SCF_HUMAN | P21583 from UniProtKB/Swiss-Prot  Length:273

    Alignment length:131
                                    43        53        63        73        83        93       103       113       123       133       143       153       163 
            SCF_HUMAN    34 TNNVKDVTKLVANLPKDYMITLKYVPGMDVLPSHCWISEMVVQLSDSLTDLLDKFSNISEGLSNYSIIDKLVNIVDDLVECVKENSSKDLKKSFKSPEPRLFTPEEFFRIFNRSIDAFKDFVVASETSDCV 164
               SCOP domains d1exzc_ C: Stem cell factor, SCF                                                                                                    SCOP domains
               CATH domains 1exzC00 C:409-539  [code=1.20.1250.10, no name defined]                                                                             CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhhhhhh......eeee........hhhhhhhhhhhhhhhhhhhhhh.........hhhhhhhhhhhhhhhhhhhhh...............eeeehhhhhhhhhhhhhhh.............. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------- PROSITE
               Transcript 1 Exon 1.3  Exon 1.5             Exon 1.6  PDB: C:440-496 UniProt: 65-121                 Exon 1.7  PDB: C:497-539 UniProt: 122-174   Transcript 1
                 1exz C 409 TNNVKDVTKLVANLPKDYMITLKYVPGMDVLPSHCWISEMVVQLSDSLTDLLDKFSNISEGLSNYSIIDKLVNIVDDLVECVKENSSKDLKKSFKSPEPRLFTPEEFFRIFNRSIDAFKDFVVASETSDCV 539
                                   418       428       438       448       458       468       478       488       498       508       518       528       538

Chain D from PDB  Type:PROTEIN  Length:124
 aligned with SCF_HUMAN | P21583 from UniProtKB/Swiss-Prot  Length:273

    Alignment length:124
                                    43        53        63        73        83        93       103       113       123       133       143       153    
            SCF_HUMAN    34 TNNVKDVTKLVANLPKDYMITLKYVPGMDVLPSHCWISEMVVQLSDSLTDLLDKFSNISEGLSNYSIIDKLVNIVDDLVECVKENSSKDLKKSFKSPEPRLFTPEEFFRIFNRSIDAFKDFVVA 157
               SCOP domains d1exzd_ D: Stem cell factor, SCF                                                                                             SCOP domains
               CATH domains 1exzD00 D:609-732  [code=1.20.1250.10, no name defined]                                                                      CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhh......eeee.............hhhhhhhhhhhhhhhhh.........hhhhhhhhhhhhhhhhhhhhhhh.............eeeehhhhhhhhhhhhhhhhh..... Sec.struct. author
                 SAPs(SNPs) --S-----------------A-------------------------------------------------V----------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------- PROSITE
               Transcript 1 Exon 1.3  Exon 1.5             Exon 1.6  PDB: D:640-696 UniProt: 65-121                 Exon 1.7  PDB: D:697-732             Transcript 1
                 1exz D 609 TNNVKDVTKLVANLPKDYMITLKYVPGMDVLPSHCWISEMVVQLSDSLTDLLDKFSNISEGLSNYSIIDKLVNIVDDLVECVKENSSKDLKKSFKSPEPRLFTPEEFFRIFNRSIDAFKDFVVA 732
                                   618       628       638       648       658       668       678       688       698       708       718       728

Legend:		→ Mismatch	(orange background)
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		→ 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 '\|'

Asymmetric Unit

Classes(

)

Folds(

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Superfamilies( (-)

)

Families(

)

Protein Domains( (-)

)

Organisms( (-)

)

Class: All alpha proteins (14657)

Fold: 4-helical cytokines (168)

Superfamily: 4-helical cytokines (168)

Family: Short-chain cytokines (78)

Protein domain: Stem cell factor, SCF (3)

Human (Homo sapiens) [TaxId: 9606] (3)

1a	d1exza_	A:
1b	d1exzb_	B:
1c	d1exzc_	C:
1d	d1exzd_	D:

Asymmetric Unit

Classes(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Mainly Alpha (13335)

Architecture: Up-down Bundle (3216)

Topology: Growth Hormone; Chain: A; (136)

Homologous Superfamily: [code=1.20.1250.10, no name defined] (130)

Human (Homo sapiens) (110)

1a	1exzB00	B:202-341
1b	1exzD00	D:609-732
1c	1exzA00	A:4-139
1d	1exzC00	C:409-539

(no "Pfam Domain" information available for 1EXZ)

Asymmetric Unit(hide GO term definitions)

Chain A,B,C,D (SCF_HUMAN | P21583)

molecular function
	GO:0005088	Ras guanyl-nucleotide exchange factor activity	Stimulates the exchange of guanyl nucleotides associated with a GTPase of the Ras superfamily. Under normal cellular physiological conditions, the concentration of GTP is higher than that of GDP, favoring the replacement of GDP by GTP in association with the GTPase.
	GO:0005125	cytokine activity	Functions to control the survival, growth, differentiation and effector function of tissues and cells.
	GO:0008083	growth factor activity	The function that stimulates a cell to grow or proliferate. Most growth factors have other actions besides the induction of cell growth or proliferation.
	GO:0046934	phosphatidylinositol-4,5-bisphosphate 3-kinase activity	Catalysis of the reaction: 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate + ATP = a 1-phosphatidyl-1D-myo-inositol 3,4,5-trisphosphate + ADP + 2 H(+).
	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:0005173	stem cell factor receptor binding	Interacting selectively and non-covalently with the stem cell factor receptor (SCFR), a type III transmembrane kinase receptor.
biological process
	GO:0000165	MAPK cascade	An intracellular protein kinase cascade containing at least a MAPK, a MAPKK and a MAP3K. The cascade can also contain two additional tiers: the upstream MAP4K and the downstream MAP Kinase-activated kinase (MAPKAPK). The kinases in each tier phosphorylate and activate the kinases in the downstream tier to transmit a signal within a cell.
	GO:0007155	cell adhesion	The attachment of a cell, either to another cell or to an underlying substrate such as the extracellular matrix, via cell adhesion molecules.
	GO:0008283	cell proliferation	The multiplication or reproduction of cells, resulting in the expansion of a cell population.
	GO:0035234	ectopic germ cell programmed cell death	Programmed cell death of an errant germ line cell that is outside the normal migratory path or ectopic to the gonad. This is an important mechanism of regulating germ cell survival within the embryo.
	GO:0035162	embryonic hemopoiesis	The stages of blood cell formation that take place within the embryo.
	GO:0097192	extrinsic apoptotic signaling pathway in absence of ligand	A series of molecular signals in which a signal is conveyed from the cell surface to trigger the apoptotic death of a cell. The pathway starts with withdrawal of a ligand from a cell surface receptor, and ends when the execution phase of apoptosis is triggered.
	GO:0008584	male gonad development	The process whose specific outcome is the progression of the male gonad over time, from its formation to the mature structure.
	GO:0043066	negative regulation of apoptotic process	Any process that stops, prevents, or reduces the frequency, rate or extent of cell death by apoptotic process.
	GO:0033026	negative regulation of mast cell apoptotic process	Any process that stops, prevents, or reduces the frequency, rate, or extent of mast cell apoptotic process.
	GO:0001755	neural crest cell migration	The characteristic movement of cells from the dorsal ridge of the neural tube to a variety of locations in a vertebrate embryo.
	GO:0001541	ovarian follicle development	The process whose specific outcome is the progression of the ovarian follicle over time, from its formation to the mature structure.
	GO:0046854	phosphatidylinositol phosphorylation	The process of introducing one or more phosphate groups into a phosphatidylinositol, any glycerophosphoinositol having one phosphatidyl group esterified to one of the hydroxy groups of inositol.
	GO:0048015	phosphatidylinositol-mediated signaling	A series of molecular signals in which a cell uses a phosphatidylinositol-mediated signaling to convert a signal into a response. Phosphatidylinositols include phosphatidylinositol (PtdIns) and its phosphorylated derivatives.
	GO:0045740	positive regulation of DNA replication	Any process that activates or increases the frequency, rate or extent of DNA replication.
	GO:0043547	positive regulation of GTPase activity	Any process that activates or increases the activity of a GTPase.
	GO:0043406	positive regulation of MAP kinase activity	Any process that activates or increases the frequency, rate or extent of MAP kinase activity.
	GO:0046579	positive regulation of Ras protein signal transduction	Any process that activates or increases the frequency, rate or extent of Ras protein signal transduction.
	GO:0008284	positive regulation of cell proliferation	Any process that activates or increases the rate or extent of cell proliferation.
	GO:1902035	positive regulation of hematopoietic stem cell proliferation	Any process that activates or increases the frequency, rate or extent of hematopoietic stem cell proliferation.
	GO:0002687	positive regulation of leukocyte migration	Any process that activates or increases the frequency, rate, or extent of leukocyte migration.
	GO:0070668	positive regulation of mast cell proliferation	Any process that activates or increases the rate or extent of mast cell proliferation.
	GO:0045636	positive regulation of melanocyte differentiation	Any process that activates or increases the frequency, rate or extent of melanocyte differentiation.
	GO:0002763	positive regulation of myeloid leukocyte differentiation	Any process that activates or increases the frequency, rate, or extent of myeloid leukocyte differentiation.
	GO:0050731	positive regulation of peptidyl-tyrosine phosphorylation	Any process that activates or increases the frequency, rate or extent of the phosphorylation of peptidyl-tyrosine.
	GO:0014066	regulation of phosphatidylinositol 3-kinase signaling	Any process that modulates the frequency, rate or extent of signal transduction mediated by the phosphatidylinositol 3-kinase cascade.
	GO:0007165	signal transduction	The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell.
cellular component
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	GO:0005856	cytoskeleton	Any of the various filamentous elements that form the internal framework of cells, and typically remain after treatment of the cells with mild detergent to remove membrane constituents and soluble components of the cytoplasm. The term embraces intermediate filaments, microfilaments, microtubules, the microtrabecular lattice, and other structures characterized by a polymeric filamentous nature and long-range order within the cell. The various elements of the cytoskeleton not only serve in the maintenance of cellular shape but also have roles in other cellular functions, including cellular movement, cell division, endocytosis, and movement of organelles.
	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:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0005886	plasma membrane	The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

Asymmetric Unit
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	Cis Peptide Bonds
(no "Cis Peptide Bonds" information available for 1exz)

Biological Units
	Complete Structure
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	1exz
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(no "Related Entries Specified in the PDB File" available for 1EXZ)

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (3, 7)

Sites (7, 7)

SS Bonds (5, 5)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (3, 12)

PROSITE Motifs (0, 0)

Exons (4, 16)

Sequences/Alignments

Classification and Annotation

SCOP Domains (1, 4)

CATH Domains (1, 4)

Pfam Domains (0, 0)

Gene Ontology (39, 39)

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Related Entries Specified in the PDB File