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Title :   CALCIUM-BOUND SCALLOP MYOSIN REGULATORY DOMAIN (LEVER ARM) WITH RECONSTITUTED COMPLETE LIGHT CHAINS

Authors :   D. M. Himmel, S. Mui, E. O'Neall-Hennessey, A. Szent-Gyorgyi, C. Cohen

Date :   17 Sep 09 (Deposition) - 01 Dec 09 (Release) - 01 Dec 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.10

Chains :   Asym./Biol. Unit : A,B,C

Keywords :   Regulated Myosins, Smooth And Molluscan Muscle, X-Ray Crystallographic Structure, Scallop Regulatory Domain/Lever Arm, On-State, Calcium-Binding Protein, Actin-Binding, Atp- Binding, Calmodulin-Binding, Coiled Coil, Cytoplasm, Motor Protein, Muscle Protein, Myosin, Nucleotide-Binding, Thick Filament, Calcium, Contractile Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   D. M. Himmel, S. Mui, E. O'Neall-Hennessey, A. G. Szent-Gyorgyi, C. Cohen
The On-Off Switch In Regulated Myosins: Different Triggers But Related Mechanisms.
J. Mol. Biol. V. 394 496 2009
PubMed-ID: 19769984 | Reference-DOI: 10.1016/J.JMB.2009.09.035
(for further references see the PDB file header)

Molecule 1 - MYOSIN HEAVY CHAIN, STRIATED ADDUCTOR MUSCLE
	Chains	:	A
	Organism Common	:	BAY SCALLOP
	Organism Scientific	:	ARGOPECTEN IRRADIANS
	Organism Taxid	:	31199
	Other Details	:	BAY SCALLOP

Molecule 2 - MYOSIN REGULATORY LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE
	Chains	:	B
	Organism Common	:	BAY SCALLOP
	Organism Scientific	:	ARGOPECTEN IRRADIANS
	Organism Taxid	:	31199
	Other Details	:	BAY SCALLOP
	Synonym	:	R-LC

Molecule 3 - MYOSIN ESSENTIAL LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE
	Chains	:	C
	Organism Common	:	BAY SCALLOP
	Organism Scientific	:	ARGOPECTEN IRRADIANS
	Organism Taxid	:	31199
	Other Details	:	BAY SCALLOP
	Synonym	:	E-LC, SULFHYDRYL LIGHT CHAIN, SHLC

		1	2	3
Asymmetric/Biological Unit	:	A	B	C

Summary Information (see also Sequences/Alignments below)

Asymmetric/Biological Unit (2, 2)

No.	Name	Count	Type	Full Name
1	CA	1	Ligand/Ion	CALCIUM ION
2	MG	1	Ligand/Ion	MAGNESIUM ION

Asymmetric Unit (2, 2)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	ASP B:28 , ASP B:30 , ASP B:32 , PHE B:34 , ASP B:39 , HOH B:234	BINDING SITE FOR RESIDUE MG B 502
2	AC2	SOFTWARE	ASP C:19 , ASP C:22 , GLY C:23 , ASP C:25 , ALA C:27 , HOH C:183	BINDING SITE FOR RESIDUE CA C 503

(no "SS Bond" information available for 3JVT)

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

(no "SAP(SNP)/Variant" information available for 3JVT)

Asymmetric/Biological Unit (3, 6)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	EF_HAND_2	PS50222	EF-hand calcium-binding domain profile.	MLE_ARGIR	7-44 82-117	2	C:6-43 C:81-116
1	EF_HAND_2	PS50222	EF-hand calcium-binding domain profile.	MLR_ARGIR	16-51 85-120	2	B:15-50 B:84-119
2	EF_HAND_1	PS00018	EF-hand calcium-binding domain.	MLR_ARGIR	29-41	1	B:28-40
3	IQ	PS50096	IQ motif profile.	MYS_ARGIR	778-805	1	A:778-805

(no "Exon" information available for 3JVT)

Asymmetric/Biological 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:63
 aligned with MYS_ARGIR | P24733 from UniProtKB/Swiss-Prot  Length:1938

    Alignment length:63
                                   784       794       804       814       824       834   
            MYS_ARGIR   775 DERLSKIISMFQAHIRGYLIRKAYKKLQDQRIGLSVIQRNIRKWLVLRNWQWWKLYSKVKPLL 837
               SCOP domains --------------------------------------------------------------- SCOP domains
               CATH domains --------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------- Pfam domains
         Sec.struct. author hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---IQ  PDB: A:778-805          -------------------------------- PROSITE
                 Transcript --------------------------------------------------------------- Transcript
                 3jvt A 775 DERLSKIISMFQAHIRGYLIRKAYKKLQDQRIGLSVIQRNIRKWLVLRNWQWWKLYSKVKPLL 837
                                   784       794       804       814       824       834

Chain B from PDB  Type:PROTEIN  Length:156
 aligned with MLR_ARGIR | P13543 from UniProtKB/Swiss-Prot  Length:157

    Alignment length:156
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151      
            MLR_ARGIR     2 ADKAASGVLTKLPQKQIQEMKEAFSMIDVDRDGFVSKEDIKAISEQLGRAPDDKELTAMLKEAPGPLNFTMFLSIFSDKLSGTDSEETIRNAFAMFDEQETKKLNIEYIKDLLENMGDNFNKDEMRMTFKEAPVEGGKFDYVKFTAMIKGSGEEEA 157
               SCOP domains d3jvtb_ B: automated matches                                                                                                                                 SCOP domains
               CATH domains --------------------------------------------------------------------------------3jvtB02 B:81-149 EF-hand                                             ------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author ............hhhhhhhhhhhhhhhh.......hhhhhhhhhhhhh...hhhhhhhhhh......hhhhhhhhhhhhhh...hhhhhhhhhhh........eehhhhhhhhhhh....hhhhhhhhhhhh.ee..eehhhhhhhhhh....... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                PROSITE (2) --------------EF_HAND_2  PDB: B:15-50             ---------------------------------EF_HAND_2  PDB: B:84-119            ------------------------------------- PROSITE (2)
                PROSITE (3) ---------------------------EF_HAND_1    -------------------------------------------------------------------------------------------------------------------- PROSITE (3)
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 3jvt B   1 ADKAASGVLTKLPQKQIQEMKEAFSMIDVDRDGFVSKEDIKAISEQLGRAPDDKELTAMLKEAPGPLNFTMFLSIFSDKLSGTDSEETIRNAFAMFDEQETKKLNIEYIKDLLENMGDNFNKDEMRMTFKEAPVEGGKFDYVKFTAMIKGSGEEEA 156
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150

Chain C from PDB  Type:PROTEIN  Length:156
 aligned with MLE_ARGIR | P07291 from UniProtKB/Swiss-Prot  Length:157

    Alignment length:156
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151      
            MLE_ARGIR     2 PKLSQDEIDDLKDVFELFDFWDGRDGAVDAFKLGDVCRCLGINPRNEDVFAVGGTHKMGEKSLPFEEFLPAYEGLMDCEQGTFADYMEAFKTFDREGQGFISGAELRHVLTALGERLSDEDVDEIIKLTDLQEDLEGNVKYEDFVKKVMAGPYPDK 157
               SCOP domains d3jvtc_ C: Myosin Regulatory Chain                                                                                                                           SCOP domains
               CATH domains --3jvtC01 C:3-80 EF-hand                                                        ---------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author .....hhhhhhhhhhhhhhhhh.....ee..hhhhhhhhh....hhhhhhhh.........eehhhhhhhhhhhhhh....hhhhhhhhhhh.......eeehhhhhhhhhhh....hhhhhhhhhhhh........eeehhhhhhhhhhh..... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE -----EF_HAND_2  PDB: C:6-43 UniProt: 7-44  -------------------------------------EF_HAND_2  PDB: C:81-116            ---------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 3jvt C   1 PKLSQDEIDDLKDVFELFDFWDGRDGAVDAFKLGDVCRCLGINPRNEDVFAVGGTHKMGEKSLPFEEFLPAYEGLMDCEQGTFADYMEAFKTFDREGQGFISGAELRHVLTALGERLSDEDVDEIIKLTDLQEDLEGNVKYEDFVKKVMAGPYPDK 156
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150

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 '\|'

Asymmetric/Biological Unit

Classes(

)

Folds(

)

Superfamilies( (-)

)

Families(

)

Protein Domains( (-)

)

Organisms( (-)

)

Class: All alpha proteins (14657)

Fold: EF Hand-like (739)

Superfamily: EF-hand (657)

Family: Calmodulin-like (356)

Protein domain: automated matches (54)

Bay scallop (Argopecten irradians) [TaxId: 31199] (2)

d3jvtb_

Protein domain: Myosin Regulatory Chain (16)

Bay scallop (Aequipecten irradians) [TaxId: 31199] (15)

d3jvtc_

Asymmetric/Biological Unit

Classes(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Mainly Alpha (13335)

Architecture: Orthogonal Bundle (10391)

Topology: Recoverin; domain 1 (474)

Homologous Superfamily: EF-hand (412)

Bay scallop (Argopecten irradians) (2)

1a	3jvtC01	C:3-80
1b	3jvtB02	B:81-149

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

Asymmetric/Biological Unit(hide GO term definitions)

Chain A (MYS_ARGIR | P24733)

molecular function
	GO:0005524	ATP binding	Interacting selectively and non-covalently with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
	GO:0003779	actin binding	Interacting selectively and non-covalently with monomeric or multimeric forms of actin, including actin filaments.
	GO:0005516	calmodulin binding	Interacting selectively and non-covalently with calmodulin, a calcium-binding protein with many roles, both in the calcium-bound and calcium-free states.
	GO:0003774	motor activity	Catalysis of the generation of force resulting either in movement along a microfilament or microtubule, or in torque resulting in membrane scission, coupled to the hydrolysis of a nucleoside triphosphate.
	GO:0000166	nucleotide binding	Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
cellular component
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	GO:0030016	myofibril	The contractile element of skeletal and cardiac muscle; a long, highly organized bundle of actin, myosin, and other proteins that contracts by a sliding filament mechanism.
	GO:0016459	myosin complex	A protein complex, formed of one or more myosin heavy chains plus associated light chains and other proteins, that functions as a molecular motor; uses the energy of ATP hydrolysis to move actin filaments or to move vesicles or other cargo on fixed actin filaments; has magnesium-ATPase activity and binds actin. Myosin classes are distinguished based on sequence features of the motor, or head, domain, but also have distinct tail regions that are believed to bind specific cargoes.
	GO:0032982	myosin filament	A protein complex containing myosin heavy chains, plus associated light chains and other proteins, in which the myosin heavy chains are arranged into a filament.

Chain B (MLR_ARGIR | P13543)

molecular function
	GO:0005509	calcium ion binding	Interacting selectively and non-covalently with calcium ions (Ca2+).
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
cellular component
	GO:0016459	myosin complex	A protein complex, formed of one or more myosin heavy chains plus associated light chains and other proteins, that functions as a molecular motor; uses the energy of ATP hydrolysis to move actin filaments or to move vesicles or other cargo on fixed actin filaments; has magnesium-ATPase activity and binds actin. Myosin classes are distinguished based on sequence features of the motor, or head, domain, but also have distinct tail regions that are believed to bind specific cargoes.

Chain C (MLE_ARGIR | P07291)

molecular function
	GO:0005509	calcium ion binding	Interacting selectively and non-covalently with calcium ions (Ca2+).
cellular component
	GO:0016459	myosin complex	A protein complex, formed of one or more myosin heavy chains plus associated light chains and other proteins, that functions as a molecular motor; uses the energy of ATP hydrolysis to move actin filaments or to move vesicles or other cargo on fixed actin filaments; has magnesium-ATPase activity and binds actin. Myosin classes are distinguished based on sequence features of the motor, or head, domain, but also have distinct tail regions that are believed to bind specific cargoes.

Asymmetric/Biological Unit
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Description

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Ligands, Modified Residues, Ions (2, 2)

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