HPT_PAPHA
ID HPT_PAPHA Reviewed; 347 AA.
AC Q5VAN1;
DT 26-APR-2005, integrated into UniProtKB/Swiss-Prot.
DT 07-DEC-2004, sequence version 1.
DT 25-MAY-2022, entry version 72.
DE RecName: Full=Haptoglobin;
DE Contains:
DE RecName: Full=Haptoglobin alpha chain;
DE Contains:
DE RecName: Full=Haptoglobin beta chain;
DE Flags: Precursor;
GN Name=HP;
OS Papio hamadryas (Hamadryas baboon).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini;
OC Cercopithecidae; Cercopithecinae; Papio.
OX NCBI_TaxID=9557;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA].
RX PubMed=15500911; DOI=10.1016/j.molbiopara.2004.07.004;
RA Lugli E.B., Pouliot M., Molina Portela M.P., Loomis M.R., Raper J.;
RT "Characterization of primate trypanosome lytic factors.";
RL Mol. Biochem. Parasitol. 138:9-20(2004).
CC -!- FUNCTION: As a result of hemolysis, hemoglobin is found to accumulate
CC in the kidney and is secreted in the urine. Haptoglobin captures, and
CC combines with free plasma hemoglobin to allow hepatic recycling of heme
CC iron and to prevent kidney damage. Haptoglobin also acts as an
CC antioxidant, has antibacterial activity and plays a role in modulating
CC many aspects of the acute phase response. Hemoglobin/haptoglobin
CC complexes are rapidly cleared by the macrophage CD163 scavenger
CC receptor expressed on the surface of liver Kupfer cells through an
CC endocytic lysosomal degradation pathway (By similarity). {ECO:0000250}.
CC -!- SUBUNIT: Tetramer of two alpha and two beta chains; disulfide-linked
CC (By similarity). The hemoglobin/haptoglobin complex is composed of a
CC haptoglobin dimer bound to two hemoglobin alpha-beta dimers (By
CC similarity). Interacts with CD163 (By similarity). Interacts with
CC ERGIC3 (By similarity). {ECO:0000250|UniProtKB:P00738,
CC ECO:0000250|UniProtKB:Q8SPS7}.
CC -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
CC -!- TISSUE SPECIFICITY: Expressed by the liver and secreted in plasma.
CC -!- DOMAIN: The beta chain mediates most of the interactions with both
CC subunits of hemoglobin, while the alpha chain forms the homodimeric
CC interface. {ECO:0000250}.
CC -!- SIMILARITY: Belongs to the peptidase S1 family. {ECO:0000255|PROSITE-
CC ProRule:PRU00274}.
CC -!- CAUTION: Although homologous to serine proteases, it has lost all
CC essential catalytic residues and has no enzymatic activity.
CC {ECO:0000305}.
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DR EMBL; AY555147; AAT37513.1; -; mRNA.
DR AlphaFoldDB; Q5VAN1; -.
DR SMR; Q5VAN1; -.
DR PRIDE; Q5VAN1; -.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0016209; F:antioxidant activity; IEA:UniProtKB-KW.
DR GO; GO:0030492; F:hemoglobin binding; IEA:UniProtKB-KW.
DR GO; GO:0006953; P:acute-phase response; IEA:UniProtKB-KW.
DR GO; GO:0042742; P:defense response to bacterium; IEA:UniProtKB-KW.
DR GO; GO:0002376; P:immune system process; IEA:UniProtKB-KW.
DR CDD; cd00033; CCP; 1.
DR CDD; cd00190; Tryp_SPc; 1.
DR Gene3D; 2.40.10.10; -; 2.
DR InterPro; IPR008292; Haptoglobin.
DR InterPro; IPR009003; Peptidase_S1_PA.
DR InterPro; IPR043504; Peptidase_S1_PA_chymotrypsin.
DR InterPro; IPR001314; Peptidase_S1A.
DR InterPro; IPR035976; Sushi/SCR/CCP_sf.
DR InterPro; IPR000436; Sushi_SCR_CCP_dom.
DR InterPro; IPR001254; Trypsin_dom.
DR PANTHER; PTHR24255:SF27; PTHR24255:SF27; 1.
DR Pfam; PF00089; Trypsin; 1.
DR PIRSF; PIRSF001137; Haptoglobin; 1.
DR PRINTS; PR00722; CHYMOTRYPSIN.
DR SMART; SM00020; Tryp_SPc; 1.
DR SUPFAM; SSF50494; SSF50494; 1.
DR SUPFAM; SSF57535; SSF57535; 1.
DR PROSITE; PS50923; SUSHI; 1.
DR PROSITE; PS50240; TRYPSIN_DOM; 1.
PE 2: Evidence at transcript level;
KW Acute phase; Antibiotic; Antimicrobial; Antioxidant; Disulfide bond;
KW Glycoprotein; Hemoglobin-binding; Immunity; Secreted;
KW Serine protease homolog; Signal; Sushi.
FT SIGNAL 1..18
FT /evidence="ECO:0000250"
FT CHAIN 19..347
FT /note="Haptoglobin"
FT /id="PRO_0000028471"
FT CHAIN 19..101
FT /note="Haptoglobin alpha chain"
FT /id="PRO_0000028472"
FT CHAIN 103..347
FT /note="Haptoglobin beta chain"
FT /id="PRO_0000028473"
FT DOMAIN 31..88
FT /note="Sushi"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00302"
FT REGION 103..347
FT /note="Serine protease"
FT REGION 259..264
FT /note="Interaction with CD163"
FT /evidence="ECO:0000250"
FT CARBOHYD 125
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 148
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 152
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 182
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 232
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT DISULFID 33
FT /note="Interchain"
FT /evidence="ECO:0000250"
FT DISULFID 52..86
FT /evidence="ECO:0000250"
FT DISULFID 90..207
FT /note="Interchain (between alpha and beta chains)"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00274,
FT ECO:0000255|PROSITE-ProRule:PRU00302"
FT DISULFID 250..281
FT /evidence="ECO:0000250"
FT DISULFID 292..322
FT /evidence="ECO:0000250"
SQ SEQUENCE 347 AA; 38497 MW; 0773AEED73CFC418 CRC64;
MSDLGAVVAL LLWGQLFAVD SGNDVTDIAD DGCPKPPMIA NGYVEHLVRY QCKNYYRLRT
EGDGVYTLNN EKQWTNKAVG DKLPECEAVC GKPKNPADAV QRILGGHLDA KGSFPWQAKM
VSRHNLTTGA TLINEQWLLT TAKNLFLNHS ENATAKDIAP TLTLYVGKKQ LVEIEKVVLY
PNYSQIDIGL IKLKQKVPVN ERVMPICLPS KDYAEVGRVG YVSGWGRNAN FNFTDHLKYV
MLPVADQYDC IKHYEGSTVP EKKTPKSPVG EQPILNEHTF CAGMSKYQED TCYGDAGSAF
AVHDLEKDTW YAAGILSFDK SCGVAEYGVY VKATSIQDWV QKTIAEN
