Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3929
Number of amino acids:87
Molecular Weight:9281.92 Da
Theoretical pI:6.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)66.9%
Cysteine CYS (C)78.05%
Glutamic Acid GLU (E)33.45%
Aspartic Acid ASP (D)22.3%
Glycine GLY (G)66.9%
Phynylalanine PHE (F)44.6%
Isoleucine ILE (I)33.45%
Histidine HIS (H)22.3%
Lysine LYS (K)44.6%
Methionine MET (M)33.45%
Leucine LEU (L)89.2%
Asparagine ASN (N)33.45%
Glutamine GLN (Q)22.3%
Proline PRO (P)55.75%
Serine SER (S)1011.49%
Arginine ARG (R)11.15%
Threonine THR (T)44.6%
Tryptophan TRP (W)22.3%
Valine VAL (V)1112.64%
Tyrosine TYR (Y)11.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC412
HydrogenH649
NitrogenN105
OxygenO118
SulphurS10

FormulaC412H649N105O118S10
Total Number of Atoms:1294


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12865
Absorption 0.1% (=1 g/l)    1.386,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    1.346,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 27.59, 22.99]

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:92.8736
Grand average of hydropathicity (GRAVY):0.57