Difference between revisions of "Part:BBa K1998000"

Revision as of 01:34, 19 October 2016

Mg-Chelatase Plasmid

Sequence and Features

Overview

This composite part is made up of various genes that form the first part of the chlorophyll biosynthesis pathway. The plasmid contains six genes. They are in the order of ChlI1, ChlD, Gun4, ChlI2, CTH1, followed by ChlH. At the beginning of each gene, a ribosome binding site can be found. Before the ChlH gene, a Plac is located. One can also be found at the beginning of the plasmid. The genes encode for Magnesium chelatase subunit H (ChlH), Magnesium chelatase subunit I (Chli1/Chli2), Magnesium chelatase subunit D (ChlD), Genomes uncoupled 4 (GUN4) and Copper target 1 protein (Cth1). These genes are involved in converting protoporphyrin IX to divinyl protochlorophyllide in the presence of NADPH and O2.

Biology & Literature

Genes ChlI1 and ChlI2 form a Mg-cheltase complex (Magnesium cheltase subunit I). This complex catalyses the insertion of magnesium ion into protoporphyrin IX to yield Mg-protoporphyrin IX by forming an ATP dependent hexameric ring complex and a complex with the ChlD subunit. This complex then acts on protoporphyrin. The GUN4 gene encodes genomes uncoupled 4. This is a tetrapyrrole-binding protein which controls the production of Mg-protoporhyrin IX. The CTH1 gene encodes for a copper target protein. It forms when oxygen and copper are present catalysing Mg-protoporphyrin IX mono methyl, which converts divinyl protochlorophyllide when NADPH and O2 are present. The last gene is ChlH. This gene encodes for the magnesium shelters subunit H. This acts as a chloroplast precursor, catalysing the first step in the chlorophyl biosynthesis pathway by insertion of an Mg2+ ion into protoporphyrin IX to generate Mg-protoporphyrin IX.

[] Adhikari, N.D., Froehlich, J.E., Strand, D.D., Buck, S.M., Kramer, D.M., Larkin, R.M. (2011) GUN4-Porphyrin Complexes Bind the ChlH/GUN5 Subunit of Mg-Chelatase and Promote Chlorophyll Biosynthesis in Arabidopsis. Plant Cell 23: 1449-1467.

Protein information

ChlI1
Mass: 39.96kDa
Sequence:
MAATEVKAAEGRTEKELGQARPIFPFTAIVGQDEMKLALILNVIDPKIGGVMIMGDRGTGKSTTIRALADLLPEMQVVANDPFNSDPTDPELMSEEVRNR VKAGEQLPVSSKKIPMVDLPLGATEDRVCGTIDIEKALTEGVKAFEPGLLAKANRGILYVDEVNLLDDHLVDVLLDSAASGWNTVEREGISISHPARFIL VGSGNPEEGELRPQLLDRFGMHAQIGTVKDPRLRVQIVSQRSTFDENPAAFRKDYEAGQMALTQRIVDARKLLKQGEVNYDFRVKISQICSDLNVDGIRG DIVTNRAAKALAAFEGRTEVTPEDIYRVIPLCLRHRLRKDPLAEIDDGDRVREIFKQVFGME

ChlD
Mass: 63.84kDa
Sequence:
MRAMKVSEED SKGFDADVST RLARSYPLAA VVGQDNIKQA LLLGAVDTGL GGIAIAGRRG TAKSIMARGL HALLPPIEVV EGSICNADPE DPRSWEAGLA EKYAGGPVKT KMRSAPFVQI DGVNVVEREG ISISHPCRPL LIATYNPEEG PLREHLLDRI AIGLSADVPS TSDERVKAID AAIRFQDKPQ DTIDDTAELT DALRTSVILA REYLKDVTIA PEQVTYIVEE ARRGGVQGHR AELYAVKCAK ACAALEGRER VNKDDLRQAV QLVILPRATI LDQPPPEQEQ PPPPPPPPPP PPPQDQMEDE DQEEKEDEKE EEEKENEDQD EPEIPQEFMF ESEGVIMDPS ILMFAQQQQR AQGRSGRAKT LIFSDDRGRY IKPMLPKGDK VKRLAVDATL RAAAPYQKIR RQQAISEGKV QRKVYVDKPD MRSKKLARKA GALVIFVVDA SGSMALNRMS AAKGACMRLL AESYTSRDQV VMMVLITDGR ANVSLAKSNE DPEALKPDAP KPTADSLKDE VRDMAKKAAS AGINVLVIDT ENKFVSTGFA EEISKAAQGK YYYLPNASDA AIAAAASGAM AAAKGGY

Gun4
Mass: 24.36kDa
Sequence:
MAMRVTVAAG KLDSVSLFGG DTASLMGGSQ TVEKKKSGKE AVMEVQLSST AGIDYTVLRD HLANGEFREA EDETRALLIK LAGPEAVKRN WVYFTEVKNI SVTDFQTLDN LWKASSNNKF GYSVQKEIWV QNQKRWPKFF KQIDWTQGEN NNYRKWPMEF IYSMDAPRGH LPLTNALRGT QLFQAIMEHP AFEKSSTAKT LDQKAAEAAG RTQSLF

ChlI2
Mass: 39.56kDa
Sequence:
MPSTKAAKKP NFPFVKIQGQ EEMKLALLLN VVDPNIGGVL IMGDRGTAKS VAVRALVDML PDIDVVEGDA FNSSPTDPKF MGPDTLQRFR NGEKLPTVRM RTPLVELPLG ATEDRICGTI DIEKALTQGI KAYEPGLLAK ANRGILYVDE VNLLDDGLVD VVLDSSASGL NTVEREGVSI VHPARFIMIG SGNPQEGELR PQLLDRFGMS VNVATLQDTK QRTQLVLDRL AYEADPDAFV DSCKAEQTAL TDKLEAARQR LRSVKISEEL QILISDICSR LDVDGLRGDI VINRAAKALV AFEGRTEVTT NDVERVISGC LNHRLRKDPL DPIDNGTKVA ILFKRMTDPE IMKREEEAKK

CTH1
Mass: 43.88kDa
Sequence:
MVAATAAPQE VEGFKVMRDG IKVASDETLL TPRFYTTDFD EMERLFSLEL NKNMDMEEFE AMLNEFKLDY NQRHFVRNET FKEAAEKIQG PTRKIFIEFL ERSCTAEFSG FLLYKELGRR LKATNPVVAE IFTLMSRDEA RHAGFLNKAM SDFNLALDLG FLTKNRKYTF FKPKFIFYAT YLSEKIGYWR YISIYRHLQR NPDNQLYPLF EYFENWCQDE NRHGDFFTAV LKARPEMVND WAAKLWSRFF CLSVYITMYL NDHQRDAFYS SLGLNTTQFN QHVIIETNKS TERIFPAVPD VENPEFFRRM DLLVKYNAQL VNIGSMNLPS PIKAIMKAPI LERMVAEVFQ VFIMTPKESG SYDLDANKTA LVY

ChlH
Mass:144.14
Sequence:
MCNVATGPRP PMTTFTGGNK GPAKQQVSLD LRDDGAGMFT STSPEMRRVV PDDVKGRVKV KVVYVVLEAQ YQSAISAAVK NINAKNSKVC FEVVGYLLEE LRDQKNLDML KEDVASANIF IGSLIFIEEL AEKIVEAVSP LREKLDACLI FPSMPAVMKL NKLGTFSMAQ LGQSKSVFSE FIKSARKNND NFEEGLLKLV RTLPKVLKYL PSDKAQDAKN FVNSLQYWLG GNSDNLENLL LNTVSNYVPA LKGVDFSVAE PTAYPDVGIW HPLASGMYED LKEYLNWYDT RKDMVFAKDA PVIGLVLQRS HLVTGDEGHY SGVVAELESR GAKVIPVFAG GLDFSAPVKK FFYDPLGSGR TFVDTVVSLT GFALVGGPAR QDAPKAIEAL KNLNVPYLVS LPLVFQTTEE WLDSELGVHP VQVALQVALP ELDGAMEPIV FAGRDSNTGK SHSLPDRIAS LCARAVNWAN LRKKRNAEKK LAVTVFSFPP DKGNVGTAAY LNVFGSIYRV LKNLQREGYD VGALPPSEED LIQSVLTQKE AKFNSTDLHI AYKMKVDEYQ KLCPYAEALE ENWGKPPGTL NTNGQELLVY GRQYGNVFIG VQPTFGYEGD PMRLLFSKSA SPHHGFAAYY TFLEKIFKAD AVLHFGTHGS LEFMPGKQVG MSGVCYPDSL IGTIPNLYYY AANNPSEATI AKRRSYANTI SYLTPPAENA GLYKGLKELK ELISSYQGMR ESGRAEQICA TIIETAKLCN LDRDVTLPDA DAKDLTMDMR DSVVGQVYRK LMEIESRLLP CGLHVVGCPP TAEEAVATLV NIAELDRPDN NPPIKGMPGI LARAIGRDIE SIYSGNNKGV LADVDQLQRI TEASRTCVRE FVKDRTGLNG RIGTNWITNL LKFTGFYVDP WVRGLQNGEF ASANREELIT LFNYLEFCLT QVVKDNELGA LVEALNGQYV EPGPGGDPIR NPNVLPTGKN IHALDPQSIP TQAALKSARL VVDRLLDRER DNNGGKYPET IALVLWGTDN IKTYGESLAQ VMMMVGVKPV ADALGRVNKL EVIPLEELGR PRVDVVVNCS GVFRDLFVNQ AVENSSWSDE SQLQEMYLKR KSYAFNSDRP GAGGEMQRDV FETAMKTVDV TFQNLDSSEI SLTDVSHYFD SDPTKLVASL RNDGRTPNAY IADTTTANAQ VRTLGETVRL DARTKLLNPK WYEGMLASGY EGVREIQKRM TNTMGWSATS GMVDNWVYDE ANSTFIEDAA MAERLMNTNP NSFRKLVATF LEANGRGYWD AKPEQLERLR QLYMDVEDKI EGVE

References