Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4314
Number of amino acids:372
Molecular Weight:40935.57 Da
Theoretical pI:6.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)369.68%
Cysteine CYS (C)51.34%
Glutamic Acid GLU (E)308.06%
Aspartic Acid ASP (D)225.91%
Glycine GLY (G)266.99%
Phynylalanine PHE (F)174.57%
Isoleucine ILE (I)287.53%
Histidine HIS (H)102.69%
Lysine LYS (K)328.6%
Methionine MET (M)71.88%
Leucine LEU (L)4512.1%
Asparagine ASN (N)112.96%
Glutamine GLN (Q)61.61%
Proline PRO (P)112.96%
Serine SER (S)215.65%
Arginine ARG (R)195.11%
Threonine THR (T)164.3%
Tryptophan TRP (W)00%
Valine VAL (V)256.72%
Tyrosine TYR (Y)51.34%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1831
HydrogenH2984
NitrogenN498
OxygenO536
SulphurS12

FormulaC1831H2984N498O536S12
Total Number of Atoms:5861


Total number of positively charged residues (ARG + LYS):51
Total number of negatively charged residues (ASP + GLU):52
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7700
Absorption 0.1% (=1 g/l)    0.188,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    0.182,   assuming all CYS residues are reduced
Aromaticity:0.059

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.66

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.26, 18.55, 31.72]

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:105.699
Grand average of hydropathicity (GRAVY):-0.02