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MAF_PINFU
ID   MAF_PINFU               Reviewed;         415 AA.
AC   A0ZSF2;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 1.
DT   03-AUG-2022, entry version 55.
DE   RecName: Full=Nacrein-like protein F;
DE            EC=4.2.1.1;
OS   Pinctada fucata (Akoya pearl oyster) (Pinctada imbricata fucata).
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Mollusca; Bivalvia;
OC   Autobranchia; Pteriomorphia; Pterioida; Pterioidea; Pteriidae; Pinctada.
OX   NCBI_TaxID=50426;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA], FUNCTION, AND CRYSTALLIZATION.
RC   TISSUE=Gill, and Mantle;
RX   PubMed=18080162; DOI=10.1007/s10126-007-9061-x;
RA   Norizuki M., Samata T.;
RT   "Distribution and function of the nacrein-related proteins inferred from
RT   structural analysis.";
RL   Mar. Biotechnol. 10:234-241(2008).
CC   -!- FUNCTION: Acts as a negative regulator for calcification in the shells
CC       of mollusks. May function both as a calcium concentrator and as a
CC       carbonic anhydrase required for production of carbonate ions, which are
CC       assembled to CaCO(3) at mineralization sites. Is important for shell
CC       formation in both the calcitic prismatic layer and the aragonitic
CC       nacreous layer (By similarity). Shows inhibitory activity of crystal
CC       formation when present in free state but, when attached to the
CC       insoluble matrix, may regulate the form and size of aragonite crystal.
CC       {ECO:0000250, ECO:0000269|PubMed:18080162}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H(+) + hydrogencarbonate = CO2 + H2O; Xref=Rhea:RHEA:10748,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:16526,
CC         ChEBI:CHEBI:17544; EC=4.2.1.1;
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000250};
CC   -!- SUBUNIT: Homooligomer; disulfide-linked. May also be disulfide-linked
CC       to insoluble organic matrix (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Secreted, extracellular space, extracellular
CC       matrix {ECO:0000250}.
CC   -!- TISSUE SPECIFICITY: Expressed in the mantle.
CC   -!- MISCELLANEOUS: Two hypotheses for calcium binding are proposed. Either
CC       the Gly-Xaa-Asn repeat domain bind calcium or sulfite and sialic acid
CC       provide the necessary negative charge in the N-glycan to promote
CC       calcium uptake.
CC   -!- SIMILARITY: Belongs to the alpha-carbonic anhydrase family.
CC       {ECO:0000305}.
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DR   EMBL; AB252479; BAF42329.1; -; mRNA.
DR   AlphaFoldDB; A0ZSF2; -.
DR   SMR; A0ZSF2; -.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-KW.
DR   GO; GO:0004089; F:carbonate dehydratase activity; IEA:UniProtKB-EC.
DR   GO; GO:0008270; F:zinc ion binding; IEA:InterPro.
DR   Gene3D; 3.10.200.10; -; 2.
DR   InterPro; IPR001148; CA_dom.
DR   InterPro; IPR036398; CA_dom_sf.
DR   InterPro; IPR023561; Carbonic_anhydrase_a-class.
DR   InterPro; IPR008160; Collagen.
DR   PANTHER; PTHR18952; PTHR18952; 2.
DR   Pfam; PF00194; Carb_anhydrase; 2.
DR   Pfam; PF01391; Collagen; 2.
DR   SMART; SM01057; Carb_anhydrase; 1.
DR   SUPFAM; SSF51069; SSF51069; 1.
DR   PROSITE; PS51144; ALPHA_CA_2; 1.
PE   1: Evidence at protein level;
KW   Calcium; Disulfide bond; Extracellular matrix; Glycoprotein; Lyase;
KW   Metal-binding; Repeat; Secreted; Zinc.
FT   CHAIN           1..415
FT                   /note="Nacrein-like protein F"
FT                   /id="PRO_0000379795"
FT   DOMAIN          33..414
FT                   /note="Alpha-carbonic anhydrase"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01134"
FT   REPEAT          225..227
FT                   /note="1"
FT   REPEAT          228..230
FT                   /note="2"
FT   REPEAT          231..233
FT                   /note="3"
FT   REPEAT          234..236
FT                   /note="4"
FT   REPEAT          237..239
FT                   /note="5"
FT   REPEAT          240..242
FT                   /note="6"
FT   REPEAT          243..245
FT                   /note="7"
FT   REPEAT          246..248
FT                   /note="8"
FT   REPEAT          249..251
FT                   /note="9"
FT   REPEAT          252..254
FT                   /note="10"
FT   REPEAT          255..257
FT                   /note="11"
FT   REPEAT          258..260
FT                   /note="12"
FT   REPEAT          261..263
FT                   /note="13"
FT   REPEAT          264..266
FT                   /note="14"
FT   REPEAT          267..269
FT                   /note="15"
FT   REPEAT          270..272
FT                   /note="16"
FT   REPEAT          273..275
FT                   /note="17"
FT   REPEAT          276..278
FT                   /note="18"
FT   REPEAT          279..281
FT                   /note="19"
FT   REPEAT          282..284
FT                   /note="20"
FT   REPEAT          285..286
FT                   /note="21"
FT   REPEAT          288..290
FT                   /note="22"
FT   REGION          201..297
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          225..290
FT                   /note="22 X 3 AA approximate tandem repeats of G-X-N"
FT   COMPBIAS        204..220
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        221..288
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         132
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01134"
FT   BINDING         134
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01134"
FT   BINDING         157
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01134"
FT   BINDING         355..356
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250"
FT   CARBOHYD        27
FT                   /note="N-linked (GlcNAc...) asparagine"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   415 AA;  46753 MW;  F1F96C9EA0E5846C CRC64;
     ASMFKHDHYM DNGVRYPNGD GICKQLNETK CDAGFSYDRS ICEGPRYWQT ISKCFIACGI
     GQRQSPINIV SYDAKFRQRL PKLKFKPHME KLKTEVTNHQ NRAPEFEPED GENLYVKLNN
     LVDGHYKFHN LHVHNGRTRR KGSEHSVNGR FTPMEAHLVF HHDEQTHFEP TRTKLGGAFP
     GHNDFVVVGV FLEVGDDGFG DEPDDEECKH ILKGHHPDNN ENGNGDNGNN GYNGDNGNNG
     DNGNNGYNGD NGNNGVNGNN GYNGDNGNNG DNGNNGENGN NGENGNNGEN GHKHGCRVKK
     AKHLSRILEC AYRNDKVREF KKVGEEEGLD VHLTPEMALP PLKYRHYYTY EGSLTTPPCT
     ESVLWVVQKC HVQVSRRVLH ALRKVEGYKD GTTLRKYGTR RPTQKNKVTV YKSFK
 
 
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