Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2552
Number of amino acids:41
Molecular Weight:4167.7 Da
Theoretical pI:8.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)49.76%
Cysteine CYS (C)819.51%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)819.51%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)12.44%
Methionine MET (M)00%
Leucine LEU (L)24.88%
Asparagine ASN (N)12.44%
Glutamine GLN (Q)512.2%
Proline PRO (P)00%
Serine SER (S)512.2%
Arginine ARG (R)24.88%
Threonine THR (T)12.44%
Tryptophan TRP (W)12.44%
Valine VAL (V)00%
Tyrosine TYR (Y)24.88%


Atomic Composition:


As there is at least one ambiguous position (B, J, X or Z) in the sequence considered, the atomic composition cannot be computed.


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8980
Absorption 0.1% (=1 g/l)    2.155,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    2.035,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 16.81

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[12.20, 34.15, 14.63]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:28.7805
Grand average of hydropathicity (GRAVY):0.00