LOCUS       sequence-142410-        6648 bp    DNA     circular SYN 15-DEC-2025
DEFINITION  Expresses proteins in the cytoplasm as fusions to a high-binding 
            mutant (A313V) maltose-binding protein.
ACCESSION   .
VERSION     .
KEYWORDS    .
SOURCE      synthetic DNA construct
  ORGANISM  synthetic DNA construct
REFERENCE   1  (bases 1 to 6648)
  AUTHORS   Walker IH, Hsieh PC, Riggs PD
  TITLE     Mutations in maltose-binding protein that alter affinity and 
            solubility properties.
  JOURNAL   Appl Microbiol Biotechnol. 2010 Sep;88(1):187-97. doi: 
            10.1007/s00253-010-2696-y. Epub 2010 Jun 10.
  PUBMED    20535468
REFERENCE   2  (bases 1 to 6648)
  AUTHORS   .
  TITLE     Direct Submission
  JOURNAL   Exported Dec 15, 2025 from SnapGene Server 8.0.1
            https://www.snapgene.com
COMMENT     SGRef: number: 1; type: "Journal Article"; doi: 
            "10.1007/s00253-010-2696-y"; journalName: "Appl Microbiol 
            Biotechnol"; date: "2010-09"; volume: "88"; issue: "1"; pages: 
            "187-97"
COMMENT     Sequence Label: pMAL-c4E
FEATURES             Location/Qualifiers
     source          1..6648
                     /mol_type="other DNA"
                     /organism="synthetic DNA construct"
     promoter        3..80
                     /gene="lacI (mutant)"
                     /label=lacIq promoter
                     /note="In the lacIq allele, a single base change in the 
                     promoter boosts expression of the lacI gene about 10-fold."
     CDS             81..1163
                     /codon_start=1
                     /gene="lacI"
                     /product="lac repressor"
                     /label=lacI
                     /note="The lac repressor binds to the lac operator to 
                     inhibit transcription in E. coli. This inhibition can be 
                     relieved by adding lactose or 
                     isopropyl-beta-D-thiogalactopyranoside (IPTG)."
                     /translation="MKPVTLYDVAEYAGVSYQTVSRVVNQASHVSAKTREKVEAAMAEL
                     NYIPNRVAQQLAGKQSLLIGVATSSLALHAPSQIVAAIKSRADQLGASVVVSMVERSGV
                     EACKAAVHNLLAQRVSGLIINYPLDDQDAIAVEAACTNVPALFLDVSDQTPINSIIFSH
                     EDGTRLGVEHLVALGHQQIALLAGPLSSVSARLRLAGWHKYLTRNQIQPIAEREGDWSA
                     MSGFQQTMQMLNEGIVPTAMLVANDQMALGAMRAITESGLRVGADISVVGYDDTEDSSC
                     YIPPLTTIKQDFRLLGQTSVDRLLQLSQGQAVKGNQLLPVSLVKRKTTLAPNTQTASPR
                     ALADSLMQLARQVSRLESGQ"
     primer_bind     complement(100..119)
                     /label=LacI-R
                     /note="LacI, reverse primer"
     promoter        join(1406..1411,1412..1427,1428..1434)
                     /label=tac promoter
                     /note="strong E. coli promoter; hybrid between the trp and 
                     lac UV5 promoters"
     protein_bind    1442..1458
                     /label=lac operator
                     /bound_moiety="lac repressor encoded by lacI"
                     /note="The lac repressor binds to the lac operator to 
                     inhibit transcription in E. coli. This inhibition can be 
                     relieved by adding lactose or 
                     isopropyl-beta-D-thiogalactopyranoside (IPTG)."
     primer_bind     1447..1469
                     /label=M13/pUC Reverse
                     /note="In lacZ gene"
     CDS             1528..2628
                     /codon_start=1
                     /gene="malE (mutated)"
                     /product="maltose binding protein from E. coli"
                     /label=MBP
                     /note="This version of the gene does not encode a signal 
                     sequence, so MBP will remain in the cytosol."
                     /translation="MKIEEGKLVIWINGDKGYNGLAEVGKKFEKDTGIKVTVEHPDKLE
                     EKFPQVAATGDGPDIIFWAHDRFGGYAQSGLLAEITPDKAFQDKLYPFTWDAVRYNGKL
                     IAYPIAVEALSLIYNKDLLPNPPKTWEEIPALDKELKAKGKSALMFNLQEPYFTWPLIA
                     ADGGYAFKYENGKYDIKDVGVDNAGAKAGLTFLVDLIKNKHMNADTDYSIAEAAFNKGE
                     TAMTINGPWAWSNIDTSKVNYGVTVLPTFKGQPSKPFVGVLSAGINAASPNKELAKEFL
                     ENYLLTDEGLEAVNKDKPLGAVALKSYEEELVKDPRIAATMENAQKGEIMPNIPQMSAF
                     WYAVRTAVINAASGRQTVDEALKDAQT"
     primer_bind     2602..2625
                     /label=MBP-F
                     /note="Maltose binding protein, forward primer"
     CDS             2677..2691
                     /codon_start=1
                     /product="enterokinase recognition and cleavage site"
                     /label=enterokinase site
                     /translation="DDDDK"
     primer_bind     complement(2739..2756)
                     /label=M13 Forward
                     /note="In lacZ gene. Also called M13-F20 or M13 (-21) 
                     Forward"
     primer_bind     complement(2739..2755)
                     /label=M13 fwd
                     /note="common sequencing primer, one of multiple similar 
                     variants"
     primer_bind     complement(2748..2770)
                     /label=M13/pUC Forward
                     /note="In lacZ gene"
     primer_bind     complement(2934..2951)
                     /label=pBAD Reverse
                     /note="For vectors with E. coli araBAD promoter, reverse 
                     primer"
     terminator      3104..3190
                     /gene="Escherichia coli rrnB"
                     /label=rrnB T1 terminator
                     /note="transcription terminator T1 from the E. coli rrnB 
                     gene"
     terminator      3282..3309
                     /label=rrnB T2 terminator
                     /note="transcription terminator T2 from the E. coli rrnB 
                     gene"
     promoter        3328..3419
                     /gene="bla"
                     /label=AmpR promoter
     CDS             join(3420..3488,3489..4280)
                     /codon_start=1
                     /gene="bla"
                     /product="beta-lactamase"
                     /label=AmpR
                     /note="confers resistance to ampicillin, carbenicillin, and
                     related antibiotics"
                     /translation="MSIQHFRVALIPFFAAFCLPVFAHPETLVKVKDAEDQLGARVGYI
                     ELDLNSGKILESFRPEERFPMMSTFKVLLCGAVLSRVDAGQEQLGRRIHYSQNDLVEYS
                     PVTEKHLTDGMTVRELCSAAITMSDNTAANLLLTTIGGPKELTAFLHNMGDHVTRLDRW
                     EPELNEAIPNDERDTTMPVAMATTLRKLLTGELLTLASRQQLIDWMEADKVAGPLLRSA
                     LPAGWFIADKSGAGERGSRGIIAALGPDGKPSRIVVIYTTGSQATMDERNRQIAEIGAS
                     LIKHW"
     primer_bind     complement(3638..3657)
                     /label=Amp-R
                     /note="Ampicillin resistance gene, reverse primer"
     rep_origin      complement(4322..4835)
                     /direction=LEFT
                     /label=M13 ori
                     /note="M13 bacteriophage origin of replication; arrow 
                     indicates direction of (+) strand synthesis"
     primer_bind     complement(4517..4538)
                     /label=F1ori-F
                     /note="F1 origin, forward primer"
     primer_bind     4729..4748
                     /label=F1ori-R
                     /note="F1 origin, reverse primer"
     rep_origin      4946..5534
                     /direction=RIGHT
                     /label=ori
                     /note="high-copy-number ColE1/pMB1/pBR322/pUC origin of 
                     replication"
     primer_bind     5435..5454
                     /label=pBR322ori-F
                     /note="pBR322 origin, forward primer"
     primer_bind     5688..5705
                     /label=L4440
                     /note="L4440 vector, forward primer"
     misc_feature    5720..5862
                     /label=bom
                     /note="basis of mobility region from pBR322"
     primer_bind     complement(5788..5807)
                     /label=pRS-marker
                     /note="pRS vectors, use to sequence yeast selectable 
                     marker"
     primer_bind     5948..5970
                     /label=pGEX 3'
                     /note="pGEX vectors, reverse primer"
     CDS             complement(5964..6155)
                     /codon_start=1
                     /gene="rop"
                     /product="Rop protein, which maintains plasmids at low copy
                     number"
                     /label=rop
                     /translation="MTKQEKTALNMARFIRSQTLTLLEKLNELDADEQADICESLHDHA
                     DELYRSCLARFGDDGENL"
ORIGIN
        1 ccgacaccat cgaatggtgc aaaacctttc gcggtatggc atgatagcgc ccggaagaga
       61 gtcaattcag ggtggtgaat gtgaaaccag taacgttata cgatgtcgca gagtatgccg
      121 gtgtctctta tcagaccgtt tcccgcgtgg tgaaccaggc cagccacgtt tctgcgaaaa
      181 cgcgggaaaa agtggaagcg gcgatggcgg agctgaatta cattcccaac cgcgtggcac
      241 aacaactggc gggcaaacag tcgttgctga ttggcgttgc cacctccagt ctggccctgc
      301 acgcgccgtc gcaaattgtc gcggcgatta aatctcgcgc cgatcaactg ggtgccagcg
      361 tggtggtgtc gatggtagaa cgaagcggcg tcgaagcctg taaagcggcg gtgcacaatc
      421 ttctcgcgca acgcgtcagt gggctgatca ttaactatcc gctggatgac caggatgcca
      481 ttgctgtgga agctgcctgc actaatgttc cggcgttatt tcttgatgtc tctgaccaga
      541 cacccatcaa cagtattatt ttctcccatg aagacggtac gcgactgggc gtggagcatc
      601 tggtcgcatt gggtcaccag caaatcgcgc tgttagcggg cccattaagt tctgtctcgg
      661 cgcgtctgcg tctggctggc tggcataaat atctcactcg caatcaaatt cagccgatag
      721 cggaacggga aggcgactgg agtgccatgt ccggttttca acaaaccatg caaatgctga
      781 atgagggcat cgttcccact gcgatgctgg ttgccaacga tcagatggcg ctgggcgcaa
      841 tgcgcgccat taccgagtcc gggctgcgcg ttggtgcgga tatctcggta gtgggatacg
      901 acgataccga agacagctca tgttatatcc cgccgttaac caccatcaaa caggattttc
      961 gcctgctggg gcaaaccagc gtggaccgct tgctgcaact ctctcagggc caggcggtga
     1021 agggcaatca gctgttgccc gtctcactgg tgaaaagaaa aaccaccctg gcgcccaata
     1081 cgcaaaccgc ctctccccgc gcgttggccg attcattaat gcagctggca cgacaggttt
     1141 cccgactgga aagcgggcag tgagcgcaac gcaattaatg taagttagct cactcattag
     1201 gcacaattct catgtttgac agcttatcat cgactgcacg gtgcaccaat gcttctggcg
     1261 tcaggcagcc atcggaagct gtggtatggc tgtgcaggtc gtaaatcact gcataattcg
     1321 tgtcgctcaa ggcgcactcc cgttctggat aatgtttttt gcgccgacat cataacggtt
     1381 ctggcaaata ttctgaaatg agctgttgac aattaatcat cggctcgtat aatgtgtgga
     1441 attgtgagcg gataacaatt tcacacagga aacagccagt ccgtttaggt gttttcacga
     1501 gcacttcacc aacaaggacc atagcatatg aaaatcgaag aaggtaaact ggtaatctgg
     1561 attaacggcg ataaaggcta taacggtctc gctgaagtcg gtaagaaatt cgagaaagat
     1621 accggaatta aagtcaccgt tgagcatccg gataaactgg aagagaaatt cccacaggtt
     1681 gcggcaactg gcgatggccc tgacattatc ttctgggcac acgaccgctt tggtggctac
     1741 gctcaatctg gcctgttggc tgaaatcacc ccggacaaag cgttccagga caagctgtat
     1801 ccgtttacct gggatgccgt acgttacaac ggcaagctga ttgcttaccc gatcgctgtt
     1861 gaagcgttat cgctgattta taacaaagat ctgctgccga acccgccaaa aacctgggaa
     1921 gagatcccgg cgctggataa agaactgaaa gcgaaaggta agagcgcgct gatgttcaac
     1981 ctgcaagaac cgtacttcac ctggccgctg attgctgctg acgggggtta tgcgttcaag
     2041 tatgaaaacg gcaagtacga cattaaagac gtgggcgtgg ataacgctgg cgcgaaagcg
     2101 ggtctgacct tcctggttga cctgattaaa aacaaacaca tgaatgcaga caccgattac
     2161 tccatcgcag aagctgcctt taataaaggc gaaacagcga tgaccatcaa cggcccgtgg
     2221 gcatggtcca acatcgacac cagcaaagtg aattatggtg taacggtact gccgaccttc
     2281 aagggtcaac catccaaacc gttcgttggc gtgctgagcg caggtattaa cgccgccagt
     2341 ccgaacaaag agctggcaaa agagttcctc gaaaactatc tgctgactga tgaaggtctg
     2401 gaagcggtta ataaagacaa accgctgggt gccgtagcgc tgaagtctta cgaggaagag
     2461 ttggtgaaag atccgcggat tgccgccact atggaaaacg cccagaaagg tgaaatcatg
     2521 ccgaacatcc cgcagatgtc cgctttctgg tatgccgtgc gtactgcggt gatcaacgcc
     2581 gccagcggtc gtcagactgt cgatgaagcc ctgaaagacg cgcagactaa ttcgagctcg
     2641 aacaacaaca acaataacaa taacaacaac ctcggggatg acgatgacaa ggtaccggaa
     2701 ttcggatcct ctagagtcga cctgcaggca agcttggcac tggccgtcgt tttacaacgt
     2761 cgtgactggg aaaaccctgg cgttacccaa cttaatcgcc ttgcagcaca tccccctttc
     2821 gccagctggc gtaatagcga agaggcccgc accgatcgcc cttcccaaca gttgcgcagc
     2881 ctgaatggcg aatggcagct tggctgtttt ggcggatgag ataagatttt cagcctgata
     2941 cagattaaat cagaacgcag aagcggtctg ataaaacaga atttgcctgg cggcagtagc
     3001 gcggtggtcc cacctgaccc catgccgaac tcagaagtga aacgccgtag cgccgatggt
     3061 agtgtggggt ctccccatgc gagagtaggg aactgccagg catcaaataa aacgaaaggc
     3121 tcagtcgaaa gactgggcct ttcgttttat ctgttgtttg tcggtgaacg ctctcctgag
     3181 taggacaaat ccgccgggag cggatttgaa cgttgcgaag caacggcccg gagggtggcg
     3241 ggcaggacgc ccgccataaa ctgccaggca tcaaattaag cagaaggcca tcctgacgga
     3301 tggccttttt gcgtttctac aaactctttt gtttattttt ctaaatacat tcaaatatgt
     3361 atccgctcat gagacaataa ccctgataaa tgcttcaata atattgaaaa aggaagagta
     3421 tgagtattca acatttccgt gtcgccctta ttcccttttt tgcggcattt tgccttcctg
     3481 tttttgctca cccagaaacg ctggtgaaag taaaagatgc tgaagatcag ttgggtgcac
     3541 gagtgggtta catcgaactg gatctcaaca gcggtaagat ccttgagagt tttcgccccg
     3601 aagaacgttt cccaatgatg agcactttta aagttctgct atgtggcgcg gtattatccc
     3661 gtgttgacgc cgggcaagag caactcggtc gccgcataca ctattctcag aatgacttgg
     3721 ttgagtactc accagtcaca gaaaagcatc ttacggatgg catgacagta agagaattat
     3781 gcagtgctgc cataaccatg agtgataaca ctgcggccaa cttacttctg acaacgatcg
     3841 gaggaccgaa ggagctaacc gcttttttgc acaacatggg ggatcatgta actcgccttg
     3901 atcgttggga accggagctg aatgaagcca taccaaacga cgagcgtgac accacgatgc
     3961 ctgtagcaat ggcaacaacg ttgcgcaaac tattaactgg cgaactactt actctagctt
     4021 cccggcaaca attaatagac tggatggagg cggataaagt tgcaggacca cttctgcgct
     4081 cggcccttcc ggctggctgg tttattgctg ataaatctgg agccggtgag cgtgggtctc
     4141 gcggtatcat tgcagcactg gggccagatg gtaagccctc ccgtatcgta gttatctaca
     4201 cgacggggag tcaggcaact atggatgaac gaaatagaca gatcgctgag ataggtgcct
     4261 cactgattaa gcattggtaa ctgtcagacc aagtttactc atatatactt tagattgatt
     4321 taccccggtt gataatcaga aaagccccaa aaacaggaag attgtataag caaatattta
     4381 aattgtaaac gttaatattt tgttaaaatt cgcgttaaat ttttgttaaa tcagctcatt
     4441 ttttaaccaa taggccgaaa tcggcaaaat cccttataaa tcaaaagaat agaccgagat
     4501 agggttgagt gttgttccag tttggaacaa gagtccacta ttaaagaacg tggactccaa
     4561 cgtcaaaggg cgaaaaaccg tctatcaggg cgatggccca ctacgtgaac catcacccaa
     4621 atcaagtttt ttggggtcga ggtgccgtaa agcactaaat cggaacccta aagggagccc
     4681 ccgatttaga gcttgacggg gaaagccggc gaacgtggcg agaaaggaag ggaagaaagc
     4741 gaaaggagcg ggcgctaggg cgctggcaag tgtagcggtc acgctgcgcg taaccaccac
     4801 acccgccgcg cttaatgcgc cgctacaggg cgcgtaaaag gatctaggtg aagatccttt
     4861 ttgataatct catgaccaaa atcccttaac gtgagttttc gttccactga gcgtcagacc
     4921 ccgtagaaaa gatcaaagga tcttcttgag atcctttttt tctgcgcgta atctgctgct
     4981 tgcaaacaaa aaaaccaccg ctaccagcgg tggtttgttt gccggatcaa gagctaccaa
     5041 ctctttttcc gaaggtaact ggcttcagca gagcgcagat accaaatact gtccttctag
     5101 tgtagccgta gttaggccac cacttcaaga actctgtagc accgcctaca tacctcgctc
     5161 tgctaatcct gttaccagtg gctgctgcca gtggcgataa gtcgtgtctt accgggttgg
     5221 actcaagacg atagttaccg gataaggcgc agcggtcggg ctgaacgggg ggttcgtgca
     5281 cacagcccag cttggagcga acgacctaca ccgaactgag atacctacag cgtgagctat
     5341 gagaaagcgc cacgcttccc gaagggagaa aggcggacag gtatccggta agcggcaggg
     5401 tcggaacagg agagcgcacg agggagcttc cagggggaaa cgcctggtat ctttatagtc
     5461 ctgtcgggtt tcgccacctc tgacttgagc gtcgattttt gtgatgctcg tcaggggggc
     5521 ggagcctatg gaaaaacgcc agcaacgcgg cctttttacg gttcctggcc ttttgctggc
     5581 cttttgctca catgttcttt cctgcgttat cccctgattc tgtggataac cgtattaccg
     5641 cctttgagtg agctgatacc gctcgccgca gccgaacgac cgagcgcagc gagtcagtga
     5701 gcgaggaagc ggaagagcgc ctgatgcggt attttctcct tacgcatctg tgcggtattt
     5761 cacaccgcat atatggtgca ctctcagtac aatctgctct gatgccgcat agttaagcca
     5821 gtatacactc cgctatcgct acgtgactgg gtcatggctg cgccccgaca cccgccaaca
     5881 cccgctgacg cgccctgacg ggcttgtctg ctcccggcat ccgcttacag acaagctgtg
     5941 accgtctccg ggagctgcat gtgtcagagg ttttcaccgt catcaccgaa acgcgcgagg
     6001 cagctgcggt aaagctcatc agcgtggtcg tgcagcgatt cacagatgtc tgcctgttca
     6061 tccgcgtcca gctcgttgag tttctccaga agcgttaatg tctggcttct gataaagcgg
     6121 gccatgttaa gggcggtttt ttcctgtttg gtcactgatg cctccgtgta agggggattt
     6181 ctgttcatgg gggtaatgat accgatgaaa cgagagagga tgctcacgat acgggttact
     6241 gatgatgaac atgcccggtt actggaacgt tgtgagggta aacaactggc ggtatggatg
     6301 cggcgggacc agagaaaaat cactcagggt caatgccagc gcttcgttaa tacagatgta
     6361 ggtgttccac agggtagcca gcagcatcct gcgatgcaga tccggaacat aatggtgcag
     6421 ggcgctgact tccgcgtttc cagactttac gaaacacgga aaccgaagac cattcatgtt
     6481 gttgctcagg tcgcagacgt tttgcagcag cagtcgcttc acgttcgctc gcgtatcggt
     6541 gattcattct gctaaccagt aaggcaaccc cgccagccta gccgggtcct caacgacagg
     6601 agcacgatca tgcgcacccg tggccaggac ccaacgctgc ccgaaatt
//
