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Entry version 115 (08 May 2019)
Sequence version 1 (01 Apr 1993)
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Protein

Sucrose permease

Gene

cscB

Organism
Escherichia coli
Status
Reviewed-Annotation score:

Annotation score:4 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Responsible for transport of sucrose into the cell, with the concomitant import of a proton (symport system) (PubMed:7535526, PubMed:22106930). Can also transport maltose, fructose or lactulose, but not glucose, lactose or melibiose (PubMed:19294451, PubMed:7535526, PubMed:22106930). The substrate specificity is directed toward the fructofuranosyl moiety of the substrate (PubMed:22106930).3 Publications

<p>This subsection of the ‘Function’ section describes biophysical and chemical properties, such as maximal absorption, kinetic parameters, pH dependence, redox potentials and temperature dependence.<p><a href='/help/biophysicochemical_properties' target='_top'>More...</a></p>Kineticsi

  1. KM=1 mM for sucrose1 Publication
  2. KM=0.37 mM for sucrose1 Publication
  3. KM=0.59 mM for maltose1 Publication
  4. KM=6.7 mM for sucrose1 Publication
  5. KM=36 mM for fructose1 Publication
  1. Vmax=23 nmol/min/mg enzyme with sucrose as substrate1 Publication
  2. Vmax=83 nmol/min/mg enzyme with sucrose as substrate1 Publication
  3. Vmax=111 nmol/min/mg enzyme with maltose as substrate1 Publication
  4. Vmax=130 nmol/min/mg enzyme with sucrose as substrate1 Publication
  5. Vmax=60 nmol/min/mg enzyme with fructose as substrate1 Publication

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section describes the metabolic pathway(s) associated with a protein.<p><a href='/help/pathway' target='_top'>More...</a></p>Pathwayi: sucrose metabolism

This protein is involved in the pathway sucrose metabolism, which is part of Glycan biosynthesis.
View all proteins of this organism that are known to be involved in the pathway sucrose metabolism and in Glycan biosynthesis.

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Biological processSugar transport, Symport, Transport

Enzyme and pathway databases

UniPathway: a resource for the exploration and annotation of metabolic pathways

More...
UniPathwayi
UPA00238

Protein family/group databases

Transport Classification Database

More...
TCDBi
2.A.1.5.3 the major facilitator superfamily (mfs)

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Sucrose permease1 Publication
Alternative name(s):
Sucrose transport proteinCurated
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:cscB1 Publication
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiEscherichia coli
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri562 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini1 – 16CytoplasmicCuratedAdd BLAST16
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei17 – 37HelicalSequence analysisAdd BLAST21
Topological domaini38 – 48PeriplasmicCuratedAdd BLAST11
Transmembranei49 – 69HelicalSequence analysisAdd BLAST21
Topological domaini70 – 77CytoplasmicCurated8
Transmembranei78 – 98HelicalSequence analysisAdd BLAST21
Topological domaini99 – 107PeriplasmicCurated9
Transmembranei108 – 128HelicalSequence analysisAdd BLAST21
Topological domaini129 – 147CytoplasmicCuratedAdd BLAST19
Transmembranei148 – 167HelicalSequence analysisAdd BLAST20
Topological domaini168 – 170PeriplasmicCurated3
Transmembranei171 – 190HelicalSequence analysisAdd BLAST20
Topological domaini191 – 220CytoplasmicCuratedAdd BLAST30
Transmembranei221 – 241HelicalSequence analysisAdd BLAST21
Topological domaini242 – 260PeriplasmicCuratedAdd BLAST19
Transmembranei261 – 281HelicalSequence analysisAdd BLAST21
Topological domaini282 – 287CytoplasmicCurated6
Transmembranei288 – 308HelicalSequence analysisAdd BLAST21
Topological domaini309 – 311PeriplasmicCurated3
Transmembranei312 – 332HelicalSequence analysisAdd BLAST21
Topological domaini333 – 342CytoplasmicCurated10
Transmembranei343 – 363HelicalSequence analysisAdd BLAST21
Topological domaini364 – 377PeriplasmicCuratedAdd BLAST14
Transmembranei378 – 398HelicalSequence analysisAdd BLAST21
Topological domaini399 – 415CytoplasmicCuratedAdd BLAST17

GO - Cellular componenti

Keywords - Cellular componenti

Cell inner membrane, Cell membrane, Membrane

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001961881 – 415Sucrose permeaseAdd BLAST415

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG4105U0F Bacteria
ENOG410XQTD LUCA

Database of Orthologous Groups

More...
OrthoDBi
791272at2

Family and domain databases

Conserved Domains Database

More...
CDDi
cd06174 MFS, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR000576 LacY/RafB_perm_fam
IPR018457 LacY/RafB_perm_fam_CS
IPR020846 MFS_dom
IPR036259 MFS_trans_sf

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF01306 LacY_symp, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00174 LACYSMPORT

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF103473 SSF103473, 1 hit

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR00882 2A0105, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00896 LACY_1, 1 hit
PS00897 LACY_2, 1 hit
PS50850 MFS, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

P30000-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MALNIPFRNA YYRFASSYSF LFFISWSLWW SLYAIWLKGH LGLTGTELGT
60 70 80 90 100
LYSVNQFTSI LFMMFYGIVQ DKLGLKKPLI WCMSFILVLT GPFMIYVYEP
110 120 130 140 150
LLQSNFSVGL ILGALFFGLG YLAGCGLLDS FTEKMARNFH FEYGTARAWG
160 170 180 190 200
SFGYAIGAFF AGIFFSISPH INFWLVSLFG AVFMMINMRF KDKDHQCIAA
210 220 230 240 250
DAGGVKKEDF IAVFKDRNFW VFVIFIVGTW SFYNIFDQQL FPVFYAGLFE
260 270 280 290 300
SHDVGTRLYG YLNSFQVVLE ALCMAIIPFF VNRVGPKNAL LIGVVIMALR
310 320 330 340 350
ILSCALFVNP WIISLVKLLH AIEVPLCVIS VFKYSVANFD KRLSSTIFLI
360 370 380 390 400
GFQIASSLGI VLLSTPTGIL FDHAGYQTVF FAISGIVCLM LLFGIFFLSK
410
KREQIVMETP VPSAI
Length:415
Mass (Da):46,924
Last modified:April 1, 1993 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iD05BBD305B61AC22
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
X63740 Genomic DNA Translation: CAA45274.1
X81461 Genomic DNA Translation: CAA57217.1

Protein sequence database of the Protein Information Resource

More...
PIRi
S30107 GRECST

NCBI Reference Sequences

More...
RefSeqi
WP_001197021.1, NZ_UWWW01000001.1

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X63740 Genomic DNA Translation: CAA45274.1
X81461 Genomic DNA Translation: CAA57217.1
PIRiS30107 GRECST
RefSeqiWP_001197021.1, NZ_UWWW01000001.1

3D structure databases

Database of comparative protein structure models

More...
ModBasei
Search...

SWISS-MODEL Interactive Workspace

More...
SWISS-MODEL-Workspacei
Submit a new modelling project...

Protein family/group databases

TCDBi2.A.1.5.3 the major facilitator superfamily (mfs)

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Phylogenomic databases

eggNOGiENOG4105U0F Bacteria
ENOG410XQTD LUCA
OrthoDBi791272at2

Enzyme and pathway databases

UniPathwayiUPA00238

Family and domain databases

CDDicd06174 MFS, 1 hit
InterProiView protein in InterPro
IPR000576 LacY/RafB_perm_fam
IPR018457 LacY/RafB_perm_fam_CS
IPR020846 MFS_dom
IPR036259 MFS_trans_sf
PfamiView protein in Pfam
PF01306 LacY_symp, 1 hit
PRINTSiPR00174 LACYSMPORT
SUPFAMiSSF103473 SSF103473, 1 hit
TIGRFAMsiTIGR00882 2A0105, 1 hit
PROSITEiView protein in PROSITE
PS00896 LACY_1, 1 hit
PS00897 LACY_2, 1 hit
PS50850 MFS, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiCSCB_ECOLX
<p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: P30000
<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 1, 1993
Last sequence update: April 1, 1993
Last modified: May 8, 2019
This is version 115 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

<p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families
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