- PDB-7sqc: Ciliary C1 central pair apparatus isolated from Chlamydomonas rei... -
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Basic information
Entry
Database: PDB / ID: 7sqc
Title
Ciliary C1 central pair apparatus isolated from Chlamydomonas reinhardtii
Components
(Unknown protein) x 4
CPC1
Calmodulin
FAP101
FAP105
FAP108
FAP114
FAP119
FAP15
FAP194
FAP216
FAP219
FAP221
FAP227
FAP246
FAP266
FAP275
FAP279
FAP297
FAP305
FAP42
FAP46
FAP47
FAP54
FAP69
FAP7
FAP74
FAP76
FAP81
FAP99
Flagellar associated protein
Heat shock protein 70A
Hydin
PF16
PF6
Phosphopyruvate hydratase
Tubulin alpha
Tubulin beta
Keywords
STRUCTURAL PROTEIN / cilia / microtubule
Function / homology
Function and homology information
axonemal central pair projection / axonemal central apparatus / axonemal central apparatus assembly / cilium movement involved in cell motility / GMP kinase activity / cilium movement / axoneme assembly / calcium-dependent cysteine-type endopeptidase activity / phosphopyruvate hydratase / phosphopyruvate hydratase complex ...axonemal central pair projection / axonemal central apparatus / axonemal central apparatus assembly / cilium movement involved in cell motility / GMP kinase activity / cilium movement / axoneme assembly / calcium-dependent cysteine-type endopeptidase activity / phosphopyruvate hydratase / phosphopyruvate hydratase complex / phosphopyruvate hydratase activity / adenylate kinase / AMP kinase activity / motile cilium / protein serine/threonine phosphatase activity / histone H2AXS140 phosphatase activity / RNA polymerase II CTD heptapeptide repeat Y1 phosphatase activity / RNA polymerase II CTD heptapeptide repeat T4 phosphatase activity / RNA polymerase II CTD heptapeptide repeat S2 phosphatase activity / RNA polymerase II CTD heptapeptide repeat S5 phosphatase activity / RNA polymerase II CTD heptapeptide repeat S7 phosphatase activity / MAP kinase serine/threonine phosphatase activity / calmodulin-dependent protein phosphatase activity / myosin phosphatase activity / protein-serine/threonine phosphatase / : / axoneme / cilium assembly / microtubule-based process / enzyme regulator activity / heat shock protein binding / protein folding chaperone / tubulin binding / cell projection / glycolytic process / ATP-dependent protein folding chaperone / electron transport chain / structural constituent of cytoskeleton / microtubule cytoskeleton / protein refolding / microtubule binding / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / microtubule / cytoskeleton / transcription coactivator activity / hydrolase activity / calmodulin binding / cilium / negative regulation of cell population proliferation / GTPase activity / calcium ion binding / regulation of DNA-templated transcription / GTP binding / magnesium ion binding / ATP hydrolysis activity / proteolysis / ATP binding / metal ion binding / nucleus / membrane / cytosol / cytoplasm Similarity search - Function
: / : / : / Androglobin, domain II / FAP42 domain B2 / FAP42 domain B3 / Associate of Myc 1 / Sperm-associated antigen 17 / Cilia- and flagella-associated protein 54 / Domain of unknown function DUF4456 ...: / : / : / Androglobin, domain II / FAP42 domain B2 / FAP42 domain B3 / Associate of Myc 1 / Sperm-associated antigen 17 / Cilia- and flagella-associated protein 54 / Domain of unknown function DUF4456 / Domain of unknown function DUF4455 / Primary ciliary dyskinesia protein 1 / Flagellar C1a complex subunit C1a-32 / Deleted in lung and esophageal cancer protein 1 / Cilia- and flagella-associated protein 99 / Cilia- and flagella-associated protein 46 / Leucine-rich repeat-containing protein 72 / : / : / : / : / : / : / : / : / : / Domain of unknown function (DUF4455) / Domain of unknown function (DUF4456) / Flagellar C1a complex subunit C1a-32 / Cilia- and flagella-associated protein 54 / Flagellar-associated PapD-like / Cilia- and flagella-associated protein 69, ARM repeat / CPC1/SPEF2 domain D5 / Deleted in lung and esophageal cancer protein 1 Ig domain / SPEF2 C-terminal domain / Cilia- and flagella-associated protein 47 domain / CFAP74 third Ig-like domain / CFAP74 forth Ig-like domain / : / Hydrocephalus-inducing-like / : / HYDIN/CFA65/VesB-like, Ig-like domain / CFAP74 first Ig-like domain / CH-like domain in sperm protein / CH-like domain in sperm protein / CFAP65, fourth Ig-like domain / : / Adenylate kinase, active site lid domain superfamily / Peptidase C2, calpain, catalytic domain / Calpain family cysteine protease / Cysteine proteinase, calpain-type, catalytic domain profile. / Calpain-like thiol protease family. / Possible plasma membrane-binding motif in junctophilins, PIP-5-kinases and protein kinases. / : / Serine-threonine protein phosphatase, N-terminal / : / Serine-threonine protein phosphatase N-terminal domain / MORN motif / MORN repeat / Transglutaminase/protease-like homologues / Transglutaminase-like / Enolase / Enolase, conserved site / Enolase, C-terminal TIM barrel domain / Enolase, N-terminal / Enolase, C-terminal TIM barrel domain / Enolase, N-terminal domain / Enolase signature. / Enolase, C-terminal TIM barrel domain / Enolase, N-terminal domain / Adenylate kinase, conserved site / Adenylate kinase signature. / Adenylate kinase/UMP-CMP kinase / Adenylate kinase / Leucine rich repeat, ribonuclease inhibitor type / Leucine-rich repeat / Serine/threonine specific protein phosphatases signature. / Protein phosphatase 2A homologues, catalytic domain. / IQ calmodulin-binding motif / Serine/threonine-specific protein phosphatase/bis(5-nucleosyl)-tetraphosphatase / Guanylate kinase-like domain profile. / Guanylate kinase-like domain / Guanylate kinase/L-type calcium channel beta subunit / Guanylate kinase / Guanylate kinase homologues. / Calponin homology domain / Armadillo/beta-catenin-like repeat / Heat shock hsp70 proteins family signature 2. / Heat shock hsp70 proteins family signature 1. / Heat shock hsp70 proteins family signature 3. / Heat shock protein 70, conserved site / Heat shock protein 70kD, peptide-binding domain superfamily / Heat shock protein 70 family / Hsp70 protein / Heat shock protein 70kD, C-terminal domain superfamily / Calponin homology (CH) domain / Leucine-rich repeats, bacterial type / Enolase-like, N-terminal / Enolase-like, C-terminal domain superfamily / Calponin homology domain Similarity search - Domain/homology
ADENOSINE-5'-DIPHOSPHATE / PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER / GUANOSINE-5'-DIPHOSPHATE / GUANOSINE-5'-TRIPHOSPHATE / Calponin-homology (CH) domain-containing protein / Radial spoke protein 10 / EF-hand domain-containing protein / adenylate kinase / Flagellar associated protein / Spermatogenesis-associated protein 17 ...ADENOSINE-5'-DIPHOSPHATE / PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER / GUANOSINE-5'-DIPHOSPHATE / GUANOSINE-5'-TRIPHOSPHATE / Calponin-homology (CH) domain-containing protein / Radial spoke protein 10 / EF-hand domain-containing protein / adenylate kinase / Flagellar associated protein / Spermatogenesis-associated protein 17 / Flagellar associated protein / Sperm-associated antigen 6 / Flagellar associated protein / Flagellar associated protein / Flagellar associated protein / Cilia- and flagella-associated protein 69 ARM repeats domain-containing protein / HYDIN/VesB/CFA65-like Ig-like domain-containing protein / Minichromosome loss protein Mcl1 middle region domain-containing protein / Flagellar associated protein 174 / Cilia- and flagella-associated protein 46 / Calmodulin / Flagellar associated protein / Cilia- and flagella-associated protein 99 / Uncharacterized protein / Cilia- and flagella-associated protein 54 / Uncharacterized protein / Uncharacterized protein / Uncharacterized protein / phosphopyruvate hydratase / FAP221 / Cilia- and flagella-associated protein 74 / Tubulin beta-1/beta-2 chain / Tubulin alpha-1 chain / Central apparatus associated protein C1a-86 / Central apparatus associated protein C1a-34 / Central apparatus associated protein C1a-32 / Central apparatus associated protein C1a-18 / Central pair complex 1 / PF6 protein / Serine/threonine-protein phosphatase Similarity search - Component
Biological species
Chlamydomonas reinhardtii (plant)
Method
ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
United States
Citation
Journal: Nat Struct Mol Biol / Year: 2022 Title: Ciliary central apparatus structure reveals mechanisms of microtubule patterning. Authors: Miao Gui / Xiangli Wang / Susan K Dutcher / Alan Brown / Rui Zhang / Abstract: A pair of extensively modified microtubules form the central apparatus (CA) of the axoneme of most motile cilia, where they regulate ciliary motility. The external surfaces of both CA microtubules ...A pair of extensively modified microtubules form the central apparatus (CA) of the axoneme of most motile cilia, where they regulate ciliary motility. The external surfaces of both CA microtubules are patterned asymmetrically with large protein complexes that repeat every 16 or 32 nm. The composition of these projections and the mechanisms that establish asymmetry and longitudinal periodicity are unknown. Here, by determining cryo-EM structures of the CA microtubules, we identify 48 different CA-associated proteins, which in turn reveal mechanisms for asymmetric and periodic protein binding to microtubules. We identify arc-MIPs, a novel class of microtubule inner protein, that bind laterally across protofilaments and remodel tubulin structure and lattice contacts. The binding mechanisms utilized by CA proteins may be generalizable to other microtubule-associated proteins. These structures establish a foundation to elucidate the contributions of individual CA proteins to ciliary motility and ciliopathies.