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Conserved domains on  [gi|301898721|ref|NP_001180446|]
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charged multivesicular body protein 3 isoform 3 [Homo sapiens]

Protein Classification

SNF7 family protein( domain architecture ID 229656)

SNF7 family protein may be involved in protein sorting and transport from the endosome to the vacuole/lysosome

Graphical summary

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List of domain hits

Name Accession Description Interval E-value
Snf7 super family cl47805
Snf7; This family of proteins are involved in protein sorting and transport from the endosome ...
18-147 4.59e-20

Snf7; This family of proteins are involved in protein sorting and transport from the endosome to the vacuole/lysosome in eukaryotic cells. Vacuoles/lysosomes play an important role in the degradation of both lipids and cellular proteins. In order to perform this degradative function, vacuoles/lysosomes contain numerous hydrolases which have been transported in the form of inactive precursors via the biosynthetic pathway and are proteolytically activated upon delivery to the vacuole/lysosome. The delivery of transmembrane proteins, such as activated cell surface receptors to the lumen of the vacuole/lysosome, either for degradation/downregulation, or in the case of hydrolases, for proper localization, requires the formation of multivesicular bodies (MVBs). These late endosomal structures are formed by invaginating and budding of the limiting membrane into the lumen of the compartment. During this process, a subset of the endosomal membrane proteins is sorted into the forming vesicles. Mature MVBs fuse with the vacuole/lysosome, thereby releasing cargo containing vesicles into its hydrolytic lumen for degradation. Endosomal proteins that are not sorted into the intralumenal MVB vesicles are either recycled back to the plasma membrane or Golgi complex, or remain in the limiting membrane of the MVB and are thereby transported to the limiting membrane of the vacuole/lysosome as a consequence of fusion. Therefore, the MVB sorting pathway plays a critical role in the decision between recycling and degradation of membrane proteins. A few archaeal sequences are also present within this family.


The actual alignment was detected with superfamily member pfam03357:

Pssm-ID: 460896 [Multi-domain]  Cd Length: 168  Bit Score: 82.29  E-value: 4.59e-20
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 301898721   18 EWSLKIRKEMRVVDRQIRDIQREEEKVKRSVKDAAKKGQKDVCIVLAKEMIRSR-------------------------- 71
Cdd:pfam03357   1 EAIRSLRKAIRKLDKKQESLEKKIEKLELEIKKLAKKGNKDAALLLLKQKKRYEkqldqldgqlsnleqqrmaienaksn 80
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 301898721   72 --------------KAMQSLVKIPEIQATMRELSKEMMKAGIIEEMLEDTFESMDDQeeMEEEAEMEIDRILFEITAGAL 137
Cdd:pfam03357  81 qevlnamkqgakamKAMNKLMDIDKIDKLMDEIEDQMEKADEISEMLSDPLDDADEE--DEEELDAELDALLDEIGDEES 158
                         170
                  ....*....|
gi 301898721  138 GKAPSKVTDA 147
Cdd:pfam03357 159 VELPSAPSGE 168
 
Name Accession Description Interval E-value
Snf7 pfam03357
Snf7; This family of proteins are involved in protein sorting and transport from the endosome ...
18-147 4.59e-20

Snf7; This family of proteins are involved in protein sorting and transport from the endosome to the vacuole/lysosome in eukaryotic cells. Vacuoles/lysosomes play an important role in the degradation of both lipids and cellular proteins. In order to perform this degradative function, vacuoles/lysosomes contain numerous hydrolases which have been transported in the form of inactive precursors via the biosynthetic pathway and are proteolytically activated upon delivery to the vacuole/lysosome. The delivery of transmembrane proteins, such as activated cell surface receptors to the lumen of the vacuole/lysosome, either for degradation/downregulation, or in the case of hydrolases, for proper localization, requires the formation of multivesicular bodies (MVBs). These late endosomal structures are formed by invaginating and budding of the limiting membrane into the lumen of the compartment. During this process, a subset of the endosomal membrane proteins is sorted into the forming vesicles. Mature MVBs fuse with the vacuole/lysosome, thereby releasing cargo containing vesicles into its hydrolytic lumen for degradation. Endosomal proteins that are not sorted into the intralumenal MVB vesicles are either recycled back to the plasma membrane or Golgi complex, or remain in the limiting membrane of the MVB and are thereby transported to the limiting membrane of the vacuole/lysosome as a consequence of fusion. Therefore, the MVB sorting pathway plays a critical role in the decision between recycling and degradation of membrane proteins. A few archaeal sequences are also present within this family.


Pssm-ID: 460896 [Multi-domain]  Cd Length: 168  Bit Score: 82.29  E-value: 4.59e-20
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 301898721   18 EWSLKIRKEMRVVDRQIRDIQREEEKVKRSVKDAAKKGQKDVCIVLAKEMIRSR-------------------------- 71
Cdd:pfam03357   1 EAIRSLRKAIRKLDKKQESLEKKIEKLELEIKKLAKKGNKDAALLLLKQKKRYEkqldqldgqlsnleqqrmaienaksn 80
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 301898721   72 --------------KAMQSLVKIPEIQATMRELSKEMMKAGIIEEMLEDTFESMDDQeeMEEEAEMEIDRILFEITAGAL 137
Cdd:pfam03357  81 qevlnamkqgakamKAMNKLMDIDKIDKLMDEIEDQMEKADEISEMLSDPLDDADEE--DEEELDAELDALLDEIGDEES 158
                         170
                  ....*....|
gi 301898721  138 GKAPSKVTDA 147
Cdd:pfam03357 159 VELPSAPSGE 168
 
Name Accession Description Interval E-value
Snf7 pfam03357
Snf7; This family of proteins are involved in protein sorting and transport from the endosome ...
18-147 4.59e-20

Snf7; This family of proteins are involved in protein sorting and transport from the endosome to the vacuole/lysosome in eukaryotic cells. Vacuoles/lysosomes play an important role in the degradation of both lipids and cellular proteins. In order to perform this degradative function, vacuoles/lysosomes contain numerous hydrolases which have been transported in the form of inactive precursors via the biosynthetic pathway and are proteolytically activated upon delivery to the vacuole/lysosome. The delivery of transmembrane proteins, such as activated cell surface receptors to the lumen of the vacuole/lysosome, either for degradation/downregulation, or in the case of hydrolases, for proper localization, requires the formation of multivesicular bodies (MVBs). These late endosomal structures are formed by invaginating and budding of the limiting membrane into the lumen of the compartment. During this process, a subset of the endosomal membrane proteins is sorted into the forming vesicles. Mature MVBs fuse with the vacuole/lysosome, thereby releasing cargo containing vesicles into its hydrolytic lumen for degradation. Endosomal proteins that are not sorted into the intralumenal MVB vesicles are either recycled back to the plasma membrane or Golgi complex, or remain in the limiting membrane of the MVB and are thereby transported to the limiting membrane of the vacuole/lysosome as a consequence of fusion. Therefore, the MVB sorting pathway plays a critical role in the decision between recycling and degradation of membrane proteins. A few archaeal sequences are also present within this family.


Pssm-ID: 460896 [Multi-domain]  Cd Length: 168  Bit Score: 82.29  E-value: 4.59e-20
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 301898721   18 EWSLKIRKEMRVVDRQIRDIQREEEKVKRSVKDAAKKGQKDVCIVLAKEMIRSR-------------------------- 71
Cdd:pfam03357   1 EAIRSLRKAIRKLDKKQESLEKKIEKLELEIKKLAKKGNKDAALLLLKQKKRYEkqldqldgqlsnleqqrmaienaksn 80
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 301898721   72 --------------KAMQSLVKIPEIQATMRELSKEMMKAGIIEEMLEDTFESMDDQeeMEEEAEMEIDRILFEITAGAL 137
Cdd:pfam03357  81 qevlnamkqgakamKAMNKLMDIDKIDKLMDEIEDQMEKADEISEMLSDPLDDADEE--DEEELDAELDALLDEIGDEES 158
                         170
                  ....*....|
gi 301898721  138 GKAPSKVTDA 147
Cdd:pfam03357 159 VELPSAPSGE 168
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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