Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4121
Number of amino acids:462
Molecular Weight:50966.34 Da
Theoretical pI:5.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)316.71%
Cysteine CYS (C)214.55%
Glutamic Acid GLU (E)326.93%
Aspartic Acid ASP (D)306.49%
Glycine GLY (G)439.31%
Phynylalanine PHE (F)153.25%
Isoleucine ILE (I)265.63%
Histidine HIS (H)61.3%
Lysine LYS (K)326.93%
Methionine MET (M)81.73%
Leucine LEU (L)275.84%
Asparagine ASN (N)204.33%
Glutamine GLN (Q)122.6%
Proline PRO (P)234.98%
Serine SER (S)398.44%
Arginine ARG (R)194.11%
Threonine THR (T)224.76%
Tryptophan TRP (W)81.73%
Valine VAL (V)255.41%
Tyrosine TYR (Y)234.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2237
HydrogenH3447
NitrogenN603
OxygenO703
SulphurS29

FormulaC2237H3447N603O703S29
Total Number of Atoms:7019


Total number of positively charged residues (ARG + LYS):51
Total number of negatively charged residues (ASP + GLU):62
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    79520
Absorption 0.1% (=1 g/l)    1.560,   assuming all pairs of CYS residues form cystines

Ext. coefficient    78270
Absorption 0.1% (=1 g/l)    1.536,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.71

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.84, 27.06, 21.21]

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:67.1429
Grand average of hydropathicity (GRAVY):-0.45