Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4958
Number of amino acids:452
Molecular Weight:49985.45 Da
Theoretical pI:8.65


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)316.86%
Cysteine CYS (C)122.65%
Glutamic Acid GLU (E)153.32%
Aspartic Acid ASP (D)286.19%
Glycine GLY (G)367.96%
Phynylalanine PHE (F)183.98%
Isoleucine ILE (I)275.97%
Histidine HIS (H)214.65%
Lysine LYS (K)245.31%
Methionine MET (M)132.88%
Leucine LEU (L)296.42%
Asparagine ASN (N)378.19%
Glutamine GLN (Q)91.99%
Proline PRO (P)132.88%
Serine SER (S)378.19%
Arginine ARG (R)255.53%
Threonine THR (T)306.64%
Tryptophan TRP (W)81.77%
Valine VAL (V)316.86%
Tyrosine TYR (Y)81.77%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2175
HydrogenH3411
NitrogenN647
OxygenO660
SulphurS25

FormulaC2175H3411N647O660S25
Total Number of Atoms:6918


Total number of positively charged residues (ARG + LYS):49
Total number of negatively charged residues (ASP + GLU):43
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    56670
Absorption 0.1% (=1 g/l)    1.134,   assuming all pairs of CYS residues form cystines

Ext. coefficient    55920
Absorption 0.1% (=1 g/l)    1.119,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.77, 27.21, 19.47]

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:75.0664
Grand average of hydropathicity (GRAVY):-0.37