CaUC03G065630 (gene) Watermelon (USVL246-FR2) v1

Overview
NameCaUC03G065630
Typegene
OrganismCitrullus amarus (Watermelon (USVL246-FR2) v1)
DescriptionBeta-galactosidase
LocationCiama_Chr03: 31264552 .. 31264776 (-)
RNA-Seq ExpressionCaUC03G065630
SyntenyCaUC03G065630
Sequences
The following sequences are available for this feature:

Gene sequence (with intron)

Legend: exonCDSpolypeptide
Hold the cursor over a type above to highlight its positions in the sequence below.
ATGTTCAACCTTCAATGGCTTGTCCTCCCCTTCATTGCAACTTTAGCTTGCTTATCCTTCTATATAGGAGGAAATGTCTCTTATGACTCAAATGCCATAATTATCAATGGTGAACGACGTGTTATCTTCTCAGGTTCAATTCATTATCCGCGCAGCACCGACGCAATGTGGCCTGATCTTATTCAAAAAGCTAAAGATGGTGGACTTGATGCAATTGAAACATAG

mRNA sequence

ATGTTCAACCTTCAATGGCTTGTCCTCCCCTTCATTGCAACTTTAGCTTGCTTATCCTTCTATATAGGAGGAAATGTCTCTTATGACTCAAATGCCATAATTATCAATGGTGAACGACGTGTTATCTTCTCAGGTTCAATTCATTATCCGCGCAGCACCGACGCAATGTGGCCTGATCTTATTCAAAAAGCTAAAGATGGTGGACTTGATGCAATTGAAACATAG

Coding sequence (CDS)

ATGTTCAACCTTCAATGGCTTGTCCTCCCCTTCATTGCAACTTTAGCTTGCTTATCCTTCTATATAGGAGGAAATGTCTCTTATGACTCAAATGCCATAATTATCAATGGTGAACGACGTGTTATCTTCTCAGGTTCAATTCATTATCCGCGCAGCACCGACGCAATGTGGCCTGATCTTATTCAAAAAGCTAAAGATGGTGGACTTGATGCAATTGAAACATAG

Protein sequence

MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQKAKDGGLDAIET
Homology
[Close]
BLAST of CaUC03G065630 vs. NCBI nr
Match: KAA0060182.1 (beta-galactosidase-like [Cucumis melo var. makuwa])

HSP 1 Score: 135.2 bits (339), Expect = 2.3e-28
Identity = 64/74 (86.49%), Postives = 67/74 (90.54%), Query Frame = 0 

Query: 1  MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60
          MFN QW VL  +ATLAC SF IG N+SYDSNAIIINGERR+IFSGSIHYPRSTDAMWPDL
Sbjct: 1  MFNFQWHVLIVVATLACFSFCIGDNISYDSNAIIINGERRLIFSGSIHYPRSTDAMWPDL 60

Query: 61 IQKAKDGGLDAIET 75
          IQKAKDGGLDAIET
Sbjct: 61 IQKAKDGGLDAIET 74

[Close]
BLAST of CaUC03G065630 vs. NCBI nr
Match: XP_008444022.1 (PREDICTED: beta-galactosidase-like [Cucumis melo])

HSP 1 Score: 133.7 bits (335), Expect = 6.7e-28
Identity = 63/74 (85.14%), Postives = 66/74 (89.19%), Query Frame = 0 

Query: 1  MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60
          MFN QW VL  +ATLAC SF IG N+SYDSNAIIINGERR+IFSGSIHYPRSTD MWPDL
Sbjct: 1  MFNFQWHVLIVVATLACFSFCIGDNISYDSNAIIINGERRLIFSGSIHYPRSTDTMWPDL 60

Query: 61 IQKAKDGGLDAIET 75
          IQKAKDGGLDAIET
Sbjct: 61 IQKAKDGGLDAIET 74

[Close]
BLAST of CaUC03G065630 vs. NCBI nr
Match: TYK04229.1 (beta-galactosidase-like [Cucumis melo var. makuwa])

HSP 1 Score: 133.7 bits (335), Expect = 6.7e-28
Identity = 63/74 (85.14%), Postives = 66/74 (89.19%), Query Frame = 0 

Query: 1  MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60
          MFN QW VL  +ATLAC SF IG N+SYDSNAIIINGERR+IFSGSIHYPRSTD MWPDL
Sbjct: 1  MFNFQWHVLIVVATLACFSFCIGDNISYDSNAIIINGERRLIFSGSIHYPRSTDTMWPDL 60

Query: 61 IQKAKDGGLDAIET 75
          IQKAKDGGLDAIET
Sbjct: 61 IQKAKDGGLDAIET 74

[Close]
BLAST of CaUC03G065630 vs. NCBI nr
Match: KAE8653552.1 (hypothetical protein Csa_007631 [Cucumis sativus])

HSP 1 Score: 131.7 bits (330), Expect = 2.6e-27
Identity = 65/74 (87.84%), Postives = 66/74 (89.19%), Query Frame = 0 

Query: 1  MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60
          MFN  W VL FIATLA  SF +G NVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL
Sbjct: 1  MFNFLWHVLLFIATLAWFSFCMGDNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60

Query: 61 IQKAKDGGLDAIET 75
          IQKAKDGGLDAIET
Sbjct: 61 IQKAKDGGLDAIET 74

[Close]
BLAST of CaUC03G065630 vs. NCBI nr
Match: KAA0040579.1 (beta-galactosidase 7-like [Cucumis melo var. makuwa])

HSP 1 Score: 130.6 bits (327), Expect = 5.7e-27
Identity = 64/74 (86.49%), Postives = 67/74 (90.54%), Query Frame = 0 

Query: 1  MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60
          MF LQWLV    ATLACL+F IG NVSYDSNAIIINGERR+IFSGSIHYPRST+AMWPDL
Sbjct: 1  MFKLQWLV----ATLACLTFCIGDNVSYDSNAIIINGERRIIFSGSIHYPRSTEAMWPDL 60

Query: 61 IQKAKDGGLDAIET 75
          IQKAKDGGLDAIET
Sbjct: 61 IQKAKDGGLDAIET 70

[Close]
BLAST of CaUC03G065630 vs. ExPASy Swiss-Prot
Match: Q9SCV8 (Beta-galactosidase 4 OS=Arabidopsis thaliana OX=3702 GN=BGAL4 PE=1 SV=1)

HSP 1 Score: 92.4 bits (228), Expect = 2.3e-18
Identity = 43/66 (65.15%), Postives = 51/66 (77.27%), Query Frame = 0 

Query: 11 FIATLACLSF--YIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQKAKDGG 70
          F+A L CLS    +  +VSYD  A+IING+RR++ SGSIHYPRST  MWP LIQKAK+GG
Sbjct: 12 FLAILCCLSLSCIVKASVSYDRKAVIINGQRRILLSGSIHYPRSTPEMWPGLIQKAKEGG 71

Query: 71 LDAIET 75
          LD IET
Sbjct: 72 LDVIET 77

[Close]
BLAST of CaUC03G065630 vs. ExPASy Swiss-Prot
Match: P48981 (Beta-galactosidase OS=Malus domestica OX=3750 PE=1 SV=1)

HSP 1 Score: 90.1 bits (222), Expect = 1.1e-17
Identity = 39/59 (66.10%), Postives = 47/59 (79.66%), Query Frame = 0 

Query: 16 ACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQKAKDGGLDAIET 75
          +C+      +VSYD  AIIING++R++ SGSIHYPRST  MWPDLIQKAKDGGLD I+T
Sbjct: 16 SCIFSAASASVSYDHKAIIINGQKRILISGSIHYPRSTPEMWPDLIQKAKDGGLDVIQT 74

[Close]
BLAST of CaUC03G065630 vs. ExPASy Swiss-Prot
Match: Q9SCW1 (Beta-galactosidase 1 OS=Arabidopsis thaliana OX=3702 GN=BGAL1 PE=2 SV=1)

HSP 1 Score: 89.7 bits (221), Expect = 1.5e-17
Identity = 38/53 (71.70%), Postives = 46/53 (86.79%), Query Frame = 0 

Query: 22 IGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQKAKDGGLDAIET 75
          + G+VSYDS AI ING+RR++ SGSIHYPRST  MWPDLI+KAK+GGLD I+T
Sbjct: 30 VSGSVSYDSRAITINGKRRILISGSIHYPRSTPEMWPDLIRKAKEGGLDVIQT 82

[Close]
BLAST of CaUC03G065630 vs. ExPASy Swiss-Prot
Match: Q9SCV9 (Beta-galactosidase 3 OS=Arabidopsis thaliana OX=3702 GN=BGAL3 PE=2 SV=1)

HSP 1 Score: 87.8 bits (216), Expect = 5.6e-17
Identity = 41/64 (64.06%), Postives = 48/64 (75.00%), Query Frame = 0 

Query: 17 CLSFYIGG------NVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQKAKDGGLD 75
          CL F I G       V+YD  A++ING+RR++FSGSIHYPRST  MW DLIQKAKDGG+D
Sbjct: 18 CLGFLILGVGFVQCGVTYDRKALLINGQRRILFSGSIHYPRSTPDMWEDLIQKAKDGGID 77

[Close]
BLAST of CaUC03G065630 vs. ExPASy Swiss-Prot
Match: Q8W0A1 (Beta-galactosidase 2 OS=Oryza sativa subsp. japonica OX=39947 GN=Os01g0580200 PE=2 SV=1)

HSP 1 Score: 87.4 bits (215), Expect = 7.3e-17
Identity = 36/63 (57.14%), Postives = 48/63 (76.19%), Query Frame = 0 

Query: 12 IATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQKAKDGGLDA 71
          +A  A L+      V+YD  A+++NG+RR++ SGSIHYPRST  MWPDLI+KAKDGGLD 
Sbjct: 12 VAVAAVLAAAASAAVTYDRKAVVVNGQRRILISGSIHYPRSTPEMWPDLIEKAKDGGLDV 71

Query: 72 IET 75
          ++T
Sbjct: 72 VQT 74

[Close]
BLAST of CaUC03G065630 vs. ExPASy TrEMBL
Match: A0A5A7UWH0 (Beta-galactosidase OS=Cucumis melo var. makuwa OX=1194695 GN=E6C27_scaffold542G00600 PE=3 SV=1)

HSP 1 Score: 135.2 bits (339), Expect = 1.1e-28
Identity = 64/74 (86.49%), Postives = 67/74 (90.54%), Query Frame = 0 

Query: 1  MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60
          MFN QW VL  +ATLAC SF IG N+SYDSNAIIINGERR+IFSGSIHYPRSTDAMWPDL
Sbjct: 1  MFNFQWHVLIVVATLACFSFCIGDNISYDSNAIIINGERRLIFSGSIHYPRSTDAMWPDL 60

Query: 61 IQKAKDGGLDAIET 75
          IQKAKDGGLDAIET
Sbjct: 61 IQKAKDGGLDAIET 74

[Close]
BLAST of CaUC03G065630 vs. ExPASy TrEMBL
Match: A0A5D3C1I9 (Beta-galactosidase OS=Cucumis melo var. makuwa OX=1194695 GN=E5676_scaffold758G00020 PE=3 SV=1)

HSP 1 Score: 133.7 bits (335), Expect = 3.3e-28
Identity = 63/74 (85.14%), Postives = 66/74 (89.19%), Query Frame = 0 

Query: 1  MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60
          MFN QW VL  +ATLAC SF IG N+SYDSNAIIINGERR+IFSGSIHYPRSTD MWPDL
Sbjct: 1  MFNFQWHVLIVVATLACFSFCIGDNISYDSNAIIINGERRLIFSGSIHYPRSTDTMWPDL 60

Query: 61 IQKAKDGGLDAIET 75
          IQKAKDGGLDAIET
Sbjct: 61 IQKAKDGGLDAIET 74

[Close]
BLAST of CaUC03G065630 vs. ExPASy TrEMBL
Match: A0A1S3BA81 (Beta-galactosidase OS=Cucumis melo OX=3656 GN=LOC103487469 PE=3 SV=1)

HSP 1 Score: 133.7 bits (335), Expect = 3.3e-28
Identity = 63/74 (85.14%), Postives = 66/74 (89.19%), Query Frame = 0 

Query: 1  MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60
          MFN QW VL  +ATLAC SF IG N+SYDSNAIIINGERR+IFSGSIHYPRSTD MWPDL
Sbjct: 1  MFNFQWHVLIVVATLACFSFCIGDNISYDSNAIIINGERRLIFSGSIHYPRSTDTMWPDL 60

Query: 61 IQKAKDGGLDAIET 75
          IQKAKDGGLDAIET
Sbjct: 61 IQKAKDGGLDAIET 74

[Close]
BLAST of CaUC03G065630 vs. ExPASy TrEMBL
Match: A0A5D3DUP4 (Beta-galactosidase OS=Cucumis melo var. makuwa OX=1194695 GN=E5676_scaffold325G00870 PE=3 SV=1)

HSP 1 Score: 130.6 bits (327), Expect = 2.8e-27
Identity = 64/74 (86.49%), Postives = 67/74 (90.54%), Query Frame = 0 

Query: 1  MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60
          MF LQWLV    ATLACL+F IG NVSYDSNAIIINGERR+IFSGSIHYPRST+AMWPDL
Sbjct: 1  MFKLQWLV----ATLACLTFCIGDNVSYDSNAIIINGERRIIFSGSIHYPRSTEAMWPDL 60

Query: 61 IQKAKDGGLDAIET 75
          IQKAKDGGLDAIET
Sbjct: 61 IQKAKDGGLDAIET 70

[Close]
BLAST of CaUC03G065630 vs. ExPASy TrEMBL
Match: A0A5A7V9Y9 (Beta-galactosidase OS=Cucumis melo var. makuwa OX=1194695 GN=E6C27_scaffold130G00750 PE=3 SV=1)

HSP 1 Score: 130.6 bits (327), Expect = 2.8e-27
Identity = 64/74 (86.49%), Postives = 67/74 (90.54%), Query Frame = 0 

Query: 1  MFNLQWLVLPFIATLACLSFYIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDL 60
          MF LQWLV    ATLACL+F IG NVSYDSNAIIINGERR+IFSGSIHYPRST+AMWPDL
Sbjct: 1  MFKLQWLV----ATLACLTFCIGDNVSYDSNAIIINGERRIIFSGSIHYPRSTEAMWPDL 60

Query: 61 IQKAKDGGLDAIET 75
          IQKAKDGGLDAIET
Sbjct: 61 IQKAKDGGLDAIET 70

[Close]
BLAST of CaUC03G065630 vs. TAIR 10
Match: AT5G56870.1 (beta-galactosidase 4 )

HSP 1 Score: 92.4 bits (228), Expect = 1.6e-19
Identity = 43/66 (65.15%), Postives = 51/66 (77.27%), Query Frame = 0 

Query: 11 FIATLACLSF--YIGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQKAKDGG 70
          F+A L CLS    +  +VSYD  A+IING+RR++ SGSIHYPRST  MWP LIQKAK+GG
Sbjct: 12 FLAILCCLSLSCIVKASVSYDRKAVIINGQRRILLSGSIHYPRSTPEMWPGLIQKAKEGG 71

Query: 71 LDAIET 75
          LD IET
Sbjct: 72 LDVIET 77

[Close]
BLAST of CaUC03G065630 vs. TAIR 10
Match: AT3G13750.1 (beta galactosidase 1 )

HSP 1 Score: 89.7 bits (221), Expect = 1.0e-18
Identity = 38/53 (71.70%), Postives = 46/53 (86.79%), Query Frame = 0 

Query: 22 IGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQKAKDGGLDAIET 75
          + G+VSYDS AI ING+RR++ SGSIHYPRST  MWPDLI+KAK+GGLD I+T
Sbjct: 30 VSGSVSYDSRAITINGKRRILISGSIHYPRSTPEMWPDLIRKAKEGGLDVIQT 82

[Close]
BLAST of CaUC03G065630 vs. TAIR 10
Match: AT4G36360.1 (beta-galactosidase 3 )

HSP 1 Score: 87.8 bits (216), Expect = 3.9e-18
Identity = 41/64 (64.06%), Postives = 48/64 (75.00%), Query Frame = 0 

Query: 17 CLSFYIGG------NVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQKAKDGGLD 75
          CL F I G       V+YD  A++ING+RR++FSGSIHYPRST  MW DLIQKAKDGG+D
Sbjct: 18 CLGFLILGVGFVQCGVTYDRKALLINGQRRILFSGSIHYPRSTPDMWEDLIQKAKDGGID 77

[Close]
BLAST of CaUC03G065630 vs. TAIR 10
Match: AT4G36360.2 (beta-galactosidase 3 )

HSP 1 Score: 87.8 bits (216), Expect = 3.9e-18
Identity = 41/64 (64.06%), Postives = 48/64 (75.00%), Query Frame = 0 

Query: 17 CLSFYIGG------NVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQKAKDGGLD 75
          CL F I G       V+YD  A++ING+RR++FSGSIHYPRST  MW DLIQKAKDGG+D
Sbjct: 18 CLGFLILGVGFVQCGVTYDRKALLINGQRRILFSGSIHYPRSTPDMWEDLIQKAKDGGID 77

[Close]
BLAST of CaUC03G065630 vs. TAIR 10
Match: AT4G26140.1 (beta-galactosidase 12 )

HSP 1 Score: 87.0 bits (214), Expect = 6.7e-18
Identity = 42/71 (59.15%), Postives = 51/71 (71.83%), Query Frame = 0 

Query: 6  WLVLPFIATLACLSFY--IGGNVSYDSNAIIINGERRVIFSGSIHYPRSTDAMWPDLIQK 65
          W++L     L C S    +   V+YD  A+IING+RR++ SGSIHYPRST  MWPDLIQK
Sbjct: 10 WILL---GILCCSSLICSVKAIVTYDRKAVIINGQRRILLSGSIHYPRSTPEMWPDLIQK 69

Query: 66 AKDGGLDAIET 75
          AKDGGLD I+T
Sbjct: 70 AKDGGLDVIQT 77

The following BLAST results are available for this feature:
BLAST of CaUC03G065630 vs. NCBI nr
Match NameE-valueIdentityDescription
KAA0060182.12.3e-2886.49beta-galactosidase-like [Cucumis melo var. makuwa][more]
XP_008444022.16.7e-2885.14PREDICTED: beta-galactosidase-like [Cucumis melo][more]
TYK04229.16.7e-2885.14beta-galactosidase-like [Cucumis melo var. makuwa][more]
KAE8653552.12.6e-2787.84hypothetical protein Csa_007631 [Cucumis sativus][more]
KAA0040579.15.7e-2786.49beta-galactosidase 7-like [Cucumis melo var. makuwa][more]
BLAST of CaUC03G065630 vs. ExPASy Swiss-Prot
Match NameE-valueIdentityDescription
Q9SCV82.3e-1865.15Beta-galactosidase 4 OS=Arabidopsis thaliana OX=3702 GN=BGAL4 PE=1 SV=1[more]
P489811.1e-1766.10Beta-galactosidase OS=Malus domestica OX=3750 PE=1 SV=1[more]
Q9SCW11.5e-1771.70Beta-galactosidase 1 OS=Arabidopsis thaliana OX=3702 GN=BGAL1 PE=2 SV=1[more]
Q9SCV95.6e-1764.06Beta-galactosidase 3 OS=Arabidopsis thaliana OX=3702 GN=BGAL3 PE=2 SV=1[more]
Q8W0A17.3e-1757.14Beta-galactosidase 2 OS=Oryza sativa subsp. japonica OX=39947 GN=Os01g0580200 PE... [more]
BLAST of CaUC03G065630 vs. ExPASy TrEMBL
Match NameE-valueIdentityDescription
A0A5A7UWH01.1e-2886.49Beta-galactosidase OS=Cucumis melo var. makuwa OX=1194695 GN=E6C27_scaffold542G0... [more]
A0A5D3C1I93.3e-2885.14Beta-galactosidase OS=Cucumis melo var. makuwa OX=1194695 GN=E5676_scaffold758G0... [more]
A0A1S3BA813.3e-2885.14Beta-galactosidase OS=Cucumis melo OX=3656 GN=LOC103487469 PE=3 SV=1[more]
A0A5D3DUP42.8e-2786.49Beta-galactosidase OS=Cucumis melo var. makuwa OX=1194695 GN=E5676_scaffold325G0... [more]
A0A5A7V9Y92.8e-2786.49Beta-galactosidase OS=Cucumis melo var. makuwa OX=1194695 GN=E6C27_scaffold130G0... [more]
BLAST of CaUC03G065630 vs. TAIR 10
Match NameE-valueIdentityDescription
AT5G56870.11.6e-1965.15beta-galactosidase 4 [more]
AT3G13750.11.0e-1871.70beta galactosidase 1 [more]
AT4G36360.13.9e-1864.06beta-galactosidase 3 [more]
AT4G36360.23.9e-1864.06beta-galactosidase 3 [more]
AT4G26140.16.7e-1859.15beta-galactosidase 12 [more]
InterPro
Analysis Name: InterPro Annotations of Watermelon (USVL246-FR2) v1
Date Performed: 2022-01-31
IPR TermIPR DescriptionSourceSource TermSource DescriptionAlignment
IPR001944Glycoside hydrolase, family 35PRINTSPR00742GLHYDRLASE35coord: 36..53
score: 63.73
coord: 57..74
score: 63.47
IPR001944Glycoside hydrolase, family 35PANTHERPTHR23421BETA-GALACTOSIDASE RELATEDcoord: 13..74
NoneNo IPR availableGENE3D3.20.20.80Glycosidasescoord: 19..74
e-value: 1.2E-16
score: 63.1
NoneNo IPR availablePANTHERPTHR23421:SF155BETA-GALACTOSIDASEcoord: 13..74
IPR031330Glycoside hydrolase 35, catalytic domainPFAMPF01301Glyco_hydro_35coord: 33..74
e-value: 4.9E-13
score: 49.4
IPR017853Glycoside hydrolase superfamilySUPERFAMILY51445(Trans)glycosidasescoord: 25..74

Relationships

The following mRNA feature(s) are a part of this gene:

Feature NameUnique NameType
CaUC03G065630.1CaUC03G065630.1mRNA


GO Annotation
GO Assignments
This gene is annotated with the following GO terms.
Category Term Accession Term Name
biological_process GO:0005975 carbohydrate metabolic process
cellular_component GO:0048046 apoplast
cellular_component GO:0005773 vacuole
molecular_function GO:0004565 beta-galactosidase activity
molecular_function GO:0030246 carbohydrate binding
molecular_function GO:0004553 hydrolase activity, hydrolyzing O-glycosyl compounds